单选题

The word contaminated in Paragraph 3 is closest in meaning to ______.

A finished

B interested

C cleared

D polluted

解析：
词义推测题。文章第三段提到“a baby given formula in developing countries is 14 times more likely to die in the first six months than one who’s breast-fed”，由此可知，是这些国家水被污染，因此喝配方奶粉长大的孩子比母乳喂养的孩子在出生后的前六个月更容易夭折。因此选择D选项。finish完成，结束。interest使……感兴趣。clear清除，使干净。意思均不符合。