Why the other options are wrong:

• They were improperly installed.: The customer reports curling, without attributing it to improper installation.
• They are not allowed under Ontario code.: Ontario code is discussed for ice-and-water shield in an installation, not as a prohibition on the current shingles.
• They are too dark and attract heat.: Colour is discussed later, but the customer does not identify excessive darkness or heat attraction as the current problem.

Correct Answer: They have a lower wind resistance rating.

Why this is correct: The contractor says three-tab shingles are rated for lower wind, usually around 90 kilometres an hour. This lower wind resistance is the key limitation the provider describes.

Why the other options are wrong:

• They are no longer sold in Northern Ontario.: Three-tab shingles are not described as no longer sold in Northern Ontario.
• They are too heavy for older houses.: Architectural shingles are heavier than three-tab, and the contractor says most local homes from the 1970s can support them without reinforcement. Three-tab shingles are not described as too heavy for older houses.
• They come in very limited colours.: Limited colour options are not mentioned as a problem with three-tab shingles.

Correct Answer: It costs significantly more upfront but lasts longer.

Why this is correct: The contractor says metal roofing has an upfront cost that is often two to three times the price of asphalt per square metre, but it lasts 40 to 50 years. It costs significantly more but lasts longer.

Why the other options are wrong:

• It requires extra roof reinforcement in most cases.: The contractor says most Thunder Bay homes from the 1970s can handle architectural shingles without reinforcement, and metal is even lighter.
• It is not suitable for residential homes.: The contractor discusses metal as a practical option for residential homes, not unsuitable.
• It performs poorly in heavy snow.: The contractor says metal sheds snow well, so it does not perform poorly in heavy snow.

Correct Answer: They balance resale appeal with reasonable cost.

Why this is correct: The contractor says architectural shingles make the most sense because buyers see them as an upgrade, but the woman does not pay the premium price of metal. They balance resale appeal with reasonable cost.

Why the other options are wrong:

• They do not require underlayment.: Underlayment is included in installation but is not a unique feature of architectural shingles.
• They are the cheapest option available.: Architectural shingles are not the cheapest - three-tab are cheaper.
• They completely eliminate ice damming.: The contractor describes architectural shingles as an upgrade without metal's premium price. Complete elimination of ice damming is not stated.

Correct Answer: Proper ventilation and insulation.

Why this is correct: The contractor says that colour affects heat absorption a bit, but ventilation and insulation matter more for preventing ice problems. Proper airflow and insulation are the key factors.

Why the other options are wrong:

• Installing thicker shingles.: Installing thicker shingles is not mentioned as the solution for ice issues.
• Choosing lighter roofing materials.: Choosing lighter materials is not the contractor's main advice.
• Using metal flashing only.: Using metal flashing only is not what the contractor recommends.

Correct Answer: Prepare a detailed price estimate and samples.

Why this is correct: The contractor says the provider can put together a detailed quote and show her a few samples that suit Thunder Bay homes. This is the clear next step after their conversation.

Why the other options are wrong:

• Begin removing the old shingles.: The contractor offers a detailed quote and samples next. A date for removing old shingles is not given.
• Apply for a building permit.: Applying for a building permit is not mentioned as the next step.
• Order materials immediately.: The contractor offers a detailed quote and samples; ordering materials immediately is not the stated next action.