The expectancy theory of motivation predicts that a person will be motivated to work hard when __________.
A. Expectancy is high and instrumentality and valence are low.
B. Instrumentality is high and expectancy and valence are low.
C. Valence is high and expectancy and instrumentality are low.
D. Expectancy, instrumentality, and valence are all high.
E. Expectancy or instrumentality or valence equals zero.