One theory concerning the importance of vitamin C in the human diet holds that vitamin C plays a crucial role in the production and maintenance of the bodyʼs supply of collagen, an important protein occurring almost exclusively in connective tissue and bones. For this reason, useful in treating the symptoms of some common illnesses.
What this question is testing
Your task
Break the argument into its conclusion and evidence, then do exactly what the question stem asks with that structure.
Common trap
Answers that sound relevant to the topic but don't connect to the argument's actual reasoning.
Winning move
Predict what a right answer must do, then test each choice against the conclusion-evidence gap.
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