Answer:
A. Effort-to-performance expectancy must be greater than zero.
Explanation:
This was been postulated by a professor of psychology from Canada in the year 1964 with his name known to be Victor Vroom.
The expectancy theory explains in derail how a person wants valence, and in process of the occurrence of this, their is huge expectance which their a belief that their will be gains when this is been done.
Expectancy important denotions include valence, expectancy and instrumentality. These are like the drivers in performances which is certainly followed by an outcome at its end. In the course of this, it is known that before motivation occurs, effort-to-performance expectancy must be greater than zero.