The Three Variables or Relationships That Are Central to Vroom's

The three variables or relationships that are central to Vroom's expectancy theory are ________.

A) effort-performance,performance-reward,and attractiveness of reward
B) performance-reward,valence,and attractiveness of reward
C) effort-reward,instrumentality,and performance-outcome
D) effort-performance,valence,and attractiveness of reward
E) effort-reward,reward-performance,and attractiveness of reward