Answer: I would contend that the right answer is the D) Motivation.
Explanation: Just to elaborate a little on the answer, it can be added that the word motivation, or motive, derives from the Latin " motīvus," which can be translated as "related to movement." Motivation is the reason or reasons that "move" a character to act in a certain way. Emotion is a reaction that often causes a psychological change of some sort, but not the reason that impels someone to act. The assessment of a situation—realizing that you have been clearly eating more—or having evidence of something—noticing that your clothes are not fitting so well anymore—may help you to resolve to lose weight, but only your motivation to do so will impel you to act.
