单选题 What is the main idea of the article?

A、 Plants that absorb metals are being studied by scientists.
B、 Scientists are trying to create cancer-fighting crops.
C、 Some wild plants can store micronutrients naturally.
D、 Anti-cancer products in the foods are good to people's diet.

【正确答案】 A

【答案解析】[分析] 本题考查对全文的理解。B，C，D皆以偏概全，不能概括文章主要内容。