Sending out a mass email when asking for help is______.A.of great efficiency and successB.

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Sending out a mass email when asking for help is______.

A.of great efficiency and success

B.the same as sending individual emails

C.no better than not contacting people

D.the last resort to get it done

请帮忙给出正确答案和分析,谢谢!

热搜:a是b的充分条件,b是a的必要条件吗