Greatly exceeding the recommended daily intake of vitamins A and D is dangerous, for they can be toxic at high levels. For some vitamin-fortified foods, each serving, as defined by the manufacturer, has 100 percent of the recommended daily intake of these vitamins. But many people overestimate what counts as a standard to three times what the manufacturers define as standard servings.
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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