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Emails _____ memos in many offices.


do not require as much professionalism as

are not used as frequently as

have begun to replace

Verified Answer :

A is you answer 

Emails do not require as much professionalism as  memos in many offices.

Emails are messages distributed by electronic means from one computer user to one or more recipients via a network. 
Memos are a written message, especially in business.