单选题 It can be inbreed that a happy person

A、 is more successful than a sad person.
B、 spends less time on his studies.
C、 tends to give unfavorable comments on things now and then.
D、 tends to give favorable impressions about what they encounter.

【正确答案】 D

【答案解析】[解析] 本题考查推理判断。从文中的第二段第九行中可以直接找到答案：Overall，happy subjects reported more favorable impressions and positive judgments than did sad subjects，选项[A]和[B]在文中没有涉及到，选项[C]与文中内容不符，故[D]为正确答案。