Maria and Adnan work in different departments of the same company. They discovered that it was much quicker to e-mail each other for information they needed from each other's departments than to wait for the official company newsletter to arrive. This is an example of the function of informal communication.

C. expediting

Explanation:

The options are:

A. confirming

B. expanding

C. expediting

D. contradicting

Maria and Adnan find that the email is quicker than the official company newsletter. This is an example of the speed up or accelerating function of information communication. And precisely it is the expediting function of informal communication. And it is no sort of confirming or authorizing or expanding or increasing or contradicting or challenging function of informal communication. And hence B. expediting is the correct answer.

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