Question 11. Choose A, B, C or D as the best answer. 11. Which of the following statements best summarises the main idea of this paragraph?单项选择题

题目图片
A

a. Despite evidence of its health benefits, fluoridation of water has not been adopted universally.

B

b. Health concerns about the risks of fluoride in drinking water are overstated.

C

c. Fluoridation of water tends to be adopted by wealthier countries.

D

d. The debate over fluoridation outweighs the benefits of adding fluoride to water.

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