单选题
The reason why people who have friends live longer than people who don't is that ______.
A、
they get a lot of help from their friend move away.
B、
they feel happier and take better care of themselves
C、
they take better care of their friends
D、
their friends can teach them how to live a longer life
【正确答案】
B
【答案解析】
本题为细节题。第五段第四句指出，那些有好朋友的人更长寿的原因在于他们更快乐，能更好的照顾自己。因此选B。
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