Which of the Following Is the Most Appropriate Medium for a Manager

Multiple Choice

Which of the following is the most appropriate medium for a manager advising employees of a revision to the company's bonus structure?

A) The manager should e-mail all those affected.
B) A face-to-face meeting should be called between the manager and employees.
C) An announcement should be posted near the office coffee machine.
D) The manager should telephone each employee.
E) A personal note should be sent to each from the manager.