Pediatrician: Child psychologists recommend that mothers of one-year-olds not only name objects in the immediate environment, but that they include the color of the object, when applicable. For instance, if a mother hands her child a red ball, she should say, “This is a red ball.” Nonetheless, even if mothers began to name the color, instead of simply saying, “This is a ball,” no real benefit will be conferred to the child, because studies have shown that children under 18-months old do not grasp the notion of color.
The pediatrician's argument is most vulnerable to which of the following?
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AInfants who hear words embedded in sentences that have each part of speech present tend to speak sooner than those infants who do not.
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BChildren usually benefit from having toys in their environments.
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CThe range at which children utter their first sentence typically ranges from 15-months to 30-months.
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DChildren under the age of three tend to be confused when parents use adult level vocabulary.
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EPsychologists have conducted studies showing that most children under the age of 30 months often utter the names of colors even when that color is not present in their environments.
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正确答案: A