The correct answer is expectancy theory
Expectation Theory argues that the strength of our motivation to act in a specific way depends on the strength of three relationships:
Expectation: my effort improves performance;
Instrumentality: my performance brings rewards;
Valencia: the rewards are attractive and valuable.
According to Vroom, leaders need to create and put into practice the first two relationships: expectation and instrumentality. The third relation, valence, is created automatically