In the context of equity theory, when people perceive that they have been underrewarded , they may try to restore equity by:

a. decreasing outcomes.
b. withholding their inputs.
c. fixing a referent as constant.
d. keeping inputs and outcomes constant.

Increasing outcomes

Explanation:

The principle of equity is based on the premise that people are motivated by fairness, and if they find inequities between their own input or output ratios and their referent party, they may try to change their input to achieve their perceived equity.

In the context of equity theory, when people perceive that they have been underrewarded , they may try to restore equity by increasing outcomes, The concept behind equity theory is that people respect equal justice which leads them to be driven to uphold fairness within their co-workers' and organization relationships.