Answer:
a. expectancy theory
Explanation:
Expectancy theory -
According to this theory , a person will behave in a specific way depending on the individual's choice , is referred to as the expectancy theory .
It is also known as the expectancy theory of motivation .
Various factors make the person to select some specific behavior over others like outcome , strength , intelligence etc.
Hence , from the given scenario of the question ,
The correct answer is expectancy theory .