Which of the following are only rated as optimizations?

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试卷: WELL AP模拟题英文A卷[查看]
Which of the following are only rated as optimizations?
以下哪项为优选项？
A: Periodic water quality testing, organic contaminants, and water treatment 定期水质检测，有机污染物和水处理
B: Public water additives, water treatment, and drinking water promotion 公共水添加剂，水处理和饮用水推广
C: Periodic water quality testing, water treatment, and drinking water promotion 定期水质检测，水处理和饮用水推广
D: Agricultural contaminants, inorganic contaminants, and organic contaminants 农业污染物，无机污染物和有机污染物

参考答案: C

本题解释:
正确答案：C