问题详情

Which of the following italicized phrases indicates CAUSE？(2010)

A．Why don"t you do it for the sake of your friends"？

B．I wish I could write as well as you.

C．For all his efforts, he didn"t get an A.

D．Her eyes were red from excessive reading.

请帮忙给出正确答案和分析，谢谢！