A Conditional Strategic Move,such as a Threat or Promise,can Be

A conditional strategic move,such as a threat or promise,can be credible only if

A) rivals believe the manager making the threat or promise can be trusted to follow through on any commitment,threat,or promise that he or she makes.
B) the strategic move harms rivals.
C) it can increase each firm's payoff.
D) when the time comes to carry out the threat or promise,fulfilling the threat or promise is in the best interest of the firm making the threat or promise.
E) none of the above.