Instrumentality is defined as

Select one:

a$.$ the value of a work goal or purpose, relative to a person's unique individual ideals and passions.

b$.$ the belief that a person has the capabilities needed to execute the behaviors required for task success.

c$.$ a set of subjective probabilities, each ranging from $0$ to $1,$ that successful performance will bring a set of outcomes.

d$.$ a subjective probability, ranging from $0$ to $1,$ that a specific amount of effort will result in a specific level of performance.