Final answer:
According to Cognitive Evaluation Theory, it is suggested that making an individual's pay non-contingent on performance makes sense because expecting extrinsic rewards can decrease intrinsic motivation.
Step-by-step explanation:
Cognitive Evaluation Theory suggests that intrinsic motivation can be affected negatively by extrinsic rewards. Specifically, it suggests that intrinsic motivation for a task tends to be reduced if an individual expects to receive an extrinsic reward, like money. Therefore, the answer to the question is (a) It would make sense to make an individual's pay non-contingent on performance. This theory highlights how intrinsic enjoyment of an activity can diminish when external rewards are introduced, a phenomenon known as the overjustification effect. In contrast, efficiency wage theory posits that better pay can lead to increased productivity because employees are motivated to maintain their higher wage.