Why the other options are wrong:

• She is required to change locks by the city.: She wants to upgrade her locks. A city requirement to do so is not mentioned.
• She needs extra keys made for her neighbours.: She does not ask for extra keys to be made for neighbours.
• She wants to repair a broken door handle.: She does not mention a broken door handle that needs repair.

Correct Answer: It prevents previous keys from working.

Why this is correct: The locksmith says rekeying changes the pins inside the lock so old keys will not work anymore. The hardware stays the same, but previous keys become useless. This stops anyone with an old key from getting in.

Why the other options are wrong:

• It allows remote access by phone.: Rekeying changes the pins so old keys no longer work. Remote phone access is not described as a rekeying feature.
• It improves battery performance in winter.: Battery performance is related to smart locks, not to the rekeying process.
• It upgrades the lock to commercial standards.: Rekeying does not upgrade the lock to commercial standards - it only changes the key pins.

Correct Answer: They are the strongest option but more expensive.

Why this is correct: Grade 1 is described as the highest rating, very strong, used in commercial buildings and usually over $200 installed. No upper price is given to establish that it is cheaper than the smart lock.

Why the other options are wrong:

• They are cheaper than smart locks.: The locksmith does not directly compare Grade 1 prices to smart lock prices.
• They are required in all rental properties.: Grade 1 deadbolts are not required in all rental properties under any rule mentioned.
• They are mainly decorative rather than secure.: Grade 1 locks are described as the strongest option, not as mainly decorative.

Correct Answer: Low temperatures can reduce battery life.

Why this is correct: The locksmith says in southern Alberta winters, the battery life of smart locks can drop fast. Cold temperatures affect how long the batteries last before needing replacement. This is something the woman had not thought about.

Why the other options are wrong:

• Cold weather can damage the door frame.: Cold weather damaging the door frame is not mentioned.
• Snow makes installation take longer.: Snow making installation take longer is not discussed.
• Winter discounts are usually available.: Winter discounts on smart locks are not mentioned.

Correct Answer: Rekey now and consider a Grade 2 upgrade if permitted.

Why this is correct: The locksmith recommends rekeying right away for immediate security. If the landlord agrees, he suggests upgrading the main door to a Grade 2 deadbolt. This gives solid protection at a reasonable price.

Why the other options are wrong:

• Replace every lock with a Grade 1 system.: The recommendation is rekeying and, with landlord approval, a Grade 2 main-door deadbolt. Her exact budget and the number of locks are not given to price an all-Grade-1 replacement.
• Wait until she buys a home before changing anything.: He does not suggest waiting until she buys a home before making any changes.
• Install smart locks on all exterior doors.: Smart locks are discussed but not recommended due to the cold weather and higher cost.

Correct Answer: Speak with her landlord about the lock changes.

Why this is correct: The woman says she will talk to her landlord and get back to the locksmith. Her lease requires the landlord's approval before making major changes. Speaking with the landlord is the necessary next step.

Why the other options are wrong:

• Cancel her current lease.: Cancelling her lease is not discussed or implied in the conversation.
• Purchase smart locks online.: She does not say she will purchase smart locks online.
• Ask the locksmith to start immediately.: She says she will talk to her landlord and get back to the locksmith. The conversation does not state that all immediate work is prohibited.