Meaning: 'Precise' means exact or clearly defined, indicating that the customer base is more specifically categorized.

Wrong options:

• usual: The word 'usual' refers to something that is common or typical, which does not convey the idea of specificity needed in this context.
• right: The term 'right' is too vague and does not specifically indicate the accuracy or clarity of the customer base.
• honest: 'Honest' relates to truthfulness and does not pertain to the definition or categorization of a customer base.

Correct answer: involved

Explanation: The word 'involved' is appropriate here as it indicates participation in the planning process. It fits grammatically and contextually, as those who are engaged in marketing plans are the ones who would not be concerned with the reasons for longevity.

Meaning: 'Involved' means being engaged or participating in something, suggesting that these individuals are part of the planning process.

Wrong options:

• linked: The term 'linked' suggests a connection but does not imply active participation in the planning process, making it contextually inappropriate.
• mixed: 'Mixed' implies a combination of different elements, which does not fit the context of being part of a planning team.
• concerned: 'Concerned' implies worry or interest, which contradicts the idea that the reasons for longevity are not an issue for those involved.

Correct answer: rather than

Explanation: The phrase 'rather than' is used to indicate a preference for one thing over another. It fits grammatically and contextually as it introduces an alternative way of referring to different age groups, enhancing clarity in the sentence.

Meaning: 'Rather than' means instead of, indicating a preference for a more specific categorization of adults.

Wrong options:

• by: The word 'by' does not convey the idea of preference and does not fit the context of comparing different ways to refer to adults.
• even when: 'Even when' introduces a condition rather than a preference, making it unsuitable for this context.
• while: 'While' suggests simultaneous actions but does not express the preference needed in this context.

Correct answer: Similarly

Explanation: The word 'Similarly' is used to draw a parallel between two ideas. It fits grammatically and contextually as it introduces a comparison between how markets refer to children and the previous discussion about adults.

Meaning: 'Similarly' means in a similar way, indicating that the following statement will relate to the previous one about adults.

Wrong options:

• While: 'While' indicates contrast rather than similarity, making it inappropriate for this context.
• Even: 'Even' does not establish a comparative relationship and is not suitable here.
• Really: 'Really' is an informal intensifier and does not fit the formal tone or context of comparison.

Correct answer: bonus

Explanation: The word 'bonus' fits grammatically and contextually as it indicates an additional benefit or advantage for business due to the diverse population. It aligns well with the positive sentiment of the sentence.

Meaning: 'Bonus' refers to an extra benefit or advantage, suggesting that diversity in age is advantageous for business.

Wrong options:

• desire: The term 'desire' refers to a wish or longing, which does not fit the context of a tangible benefit for business.
• favour: 'Favour' implies a preference or support, which does not convey the idea of an additional benefit as effectively as 'bonus'.
• promise: 'Promise' suggests a commitment or assurance, which does not align with the idea of an immediate benefit for business.