(单选题)
FDA can ask for the proof of safety and effectiveness of a product ( ).
A.If it is a drug
B.if it is a device
C.if its consumers make complaints
D.if its distributors challenge FDA’s authority
参考答案：A
参考解析：
根据If the product is a drug, FDA (Food and Drug Administration) can require proof under the Food, Drug, and Cosmetic Act that is safe and effective before it is put on the market.可知选项A正确。根据But if the product is a device, FDA has no authority to require premarketing proof of safety or effectiveness.可知选项B错误；选项CD文中均未提及。故正确答案是选项A。
知识点：细节题 英语 阅读理解 通用 英语
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