问题详情

According to the writer, e-mail has an obvious advantage over the telephone because the former helps one ______.
A．reach a group of people at one time conveniently
B．keep one"s communication as personal as possible
C．pass on much more information than the latter
D．get in touch with one"s friends faster than the latter请帮忙给出正确答案和分析，谢谢！