Grapevine is

A. office decoration plant
B. An information network
C. An official drink
D. None of these

Explanation:

The informal transmission of information, gossip, or rumor from person to person. I heard through the grapevine that she has a new job. When you hear from a friend-of-a-friend that your neighbor might be getting divorced, this is an example of a situation where you hear the news through the grapevine.