Refer to the Scenario Below to Answer the Following Questions

Refer to the scenario below to answer the following questions.
"Flo" of Communication (Scenario)
Recently the employees of Chatterbox Enterprises, Inc. received a letter from the vice-president of operations explaining that a new production facility would be built in Chatland, Ontario. It was also stated that about one-fourth of the employees from the current Chatland facility would be transferred to the new facility, and if an employee wanted to volunteer for the transfer, they could do so by applying at the human resources office. Sam, a production supervisor, first went to Florence, a purchasing manager who had already volunteered to transfer, to discuss the possibility of becoming her inventory control supervisor at the new facility. Florence told Sam that Ruth, the current inventory control supervisor, would not be transferring and that she would consider his request.
-Sam heard a rumour from a supervisor in another department that his transfer was approved two days before the human resources office called to confirm it. Sam first heard the news through which communication network?

A) chain
B) wheel
C) grapevine
D) all-channel
E) virtual