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Animals seem to have the sense to eat when they are hungry and they do not eat more than their bodies need. It has been demonstrated that rats will, when given a choice over a period of time, prefer water with vitamins to water without vitamins even

提问人：ylm发布时间：2020-10-09

A.encourage rats to drink vitamin-enriched water

B.find out rats preference in flavor

C.test whether rats know which drink is good for them

D.demonstrate that vitamins aretasteless

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Animals seem to have the sense to eat when they are hungry and they do not eat more than their bodies need. It has been demonstrated that rats will, when given a choice over a period of time, prefer water with vitamins to water without vitamins even

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