Coaching is ____.
a. a method commonly used to improve how managers communicate with their subordinates
b. a kind of one-on-one communication primarily used by managers in exit interviews
c. a kind of one-on-one communication primarily used by managers to improve an employee's on-the-job performance or behavior
d. a multilevel communication method that is used in place of negative reinforcement
e. two-way communication designed to be reciprocally fulfilling