Which of the following statements concerning grapevine is not correct?

(a) Grapevine is generally used irregularly in organizations

(b) Grapevine can and often does generate harmful rumors

(c) Grapevine is used largely to serve the self-interests of people within it

(d) Some managers use grapevine to their advantage

(e) In time, and with proper pressure, grapevine can be eliminated