单选题 Which statement relates the main idea of this passage?

A、 When salt is added to their diets, rats and men react in much the same way.
B、 The near future will see a cure for high blood pressure.
C、 Modem research has shown that high blood pressure is a result of salt in the diet.
D、 A tendency toward high blood pressure may be a hereditary factor.

【正确答案】 D

【答案解析】[精解] [A]太具体，[B]太肯定，[C]根据全文是不正确的，[D]符合第句“familialdisease”，是对的。