SAT Reading & Writing · Rhetorical Synthesis

A student has researched the Guinea worm eradication campaign and compiled the following notes: - Guinea worm disease spreads when people…

A student has researched the Guinea worm eradication campaign and compiled the following notes:
- Guinea worm disease spreads when people drink water containing infected copepods, tiny water fleas.
- No vaccine is routinely used in the eradication effort.
- Filtering drinking water through simple cloth filters can interrupt the parasite's transmission cycle.
- Case containment, keeping infected people away from water sources until the worm has fully emerged, helps prevent further transmission.
- Annual human cases have dropped from millions in the 1980s to a very small number of cases today.
- Infections in animals such as dogs complicate the final stages of eradication efforts.

The student wants to emphasize that the campaign's success did not depend on a vaccine. Which choice most effectively uses relevant information from the notes to accomplish this goal?

Answer and explanation

Answer: C: Because no vaccine is routinely used in the eradication effort, the dramatic decline in cases from millions to a very small number instead reflects behavioral interventions such as water filtering…

The goal specifically requires connecting the campaign's success to the absence of a vaccine, and C is the only choice that makes that connection explicit, tying the case decline directly to behavioral measures instead of a vaccine. A states a transmission fact without addressing method of control. B names an ongoing challenge, not the source of past success. D names one specific intervention without connecting it to the vaccine-free framing the goal requires.

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