The answer is (D) Incentive theory.
Instinct theory suggests that behaviors are driven by instincts, which are innate and fixed patterns of behavior in response to certain stimuli. This theory does not align well with the scenario, as the motivation described is not based on innate behavior but rather on external rewards.
Drive reduction theory posits that motivation arises from the need to reduce internal tension caused by unmet biological needs, such as hunger or thirst. The scenario involves an external reward (a bonus check) rather than the reduction of an internal drive.
Arousal theory suggests that people are motivated to maintain an optimal level of arousal. While the prospect of winning a contest might increase arousal, this theory does not specifically address the role of external rewards in motivation.
Incentive theory focuses on external rewards as the primary motivator for behavior. In this scenario, the sizeable bonus check serves as an external incentive that motivates you to sell the most merchandise. This aligns perfectly with the principles of incentive theory.
Achievement motivation theory emphasizes the need for success and the desire to achieve excellence. While this could be a factor in the scenario, the primary motivator mentioned is the external reward (bonus check), which is more closely aligned with incentive theory.
Maslow's Hierarchy of Needs theory outlines a progression of needs from basic physiological needs to self-actualization. While financial rewards could be related to safety and security needs, the scenario specifically highlights the role of an external incentive, making incentive theory a more precise fit.