A smoker reasons, 'Despite the health risks, smoking makes the quality of my life better by reducing my daily stress. This will probably add to my life.' Such reasoning is best explained by

Drive reduction theory posits that behavior is motivated by the desire to reduce internal drives, such as hunger or thirst. While smoking may temporarily alleviate stress, the reasoning provided by the smoker does not align with the drive reduction framework, which primarily focuses on biological needs rather than psychological justification for harmful behaviors.

Arousal theory suggests that people are motivated to maintain an optimal level of arousal, which can explain certain behaviors but does not directly apply to the smoker's justification. The smoker's reasoning is more about reconciling conflicting thoughts than about seeking optimal arousal levels, making this choice inappropriate.

Incentive theory emphasizes external rewards or stimuli that drive behavior. Although the smoker mentions stress reduction as a benefit, the focus on the conflict between health risks and perceived quality of life indicates that the reasoning is less about external incentives and more about resolving internal cognitive dissonance.