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Set 5: Text Structure (Advanced)

Explanation

Answer: A

PASSAGE

Vaccine herd immunity protects the vulnerable. When a high percentage is immune, the pathogen cannot spread. Thus, vaccination is not just a personal health choice, but a public service.

Which choice best describes the ethical expansion?

A. It moves from individual benefit to collective responsibility.✓ Correct
B. It argues that vaccines should be mandatory.
C. It explains how to make a vaccine.
D. It lists diseases.

Detailed Explanation

Mechanism: Herd immunity. Implication: Not just personal choice -> Public service (Collective responsibility).

Key Evidence:

• "protects the vulnerable"

• "not just a personal ... choice"

• "public service"

Why others are wrong: B (Implies duty, but focus is on the concept.), C (No manufacturing.), D (No list.).

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