单选题 What is implied by the author?

A、 Shiftwork had a direct effect on the attitudes and behavior of family members.
B、 Shiftworkers could live a normal life.
C、 Shiftwork couples had unconventional ideas about marriage.
D、 Female shiftworkers were satisfied with the time spent together with their families.

【正确答案】 A

【答案解析】[解析] 由文章主旨句“shift work makes the lives of families difficult"可知选A。