Final answer:
Mr. Flitch might react by liking Edwin more if he rewards him with vacation pay due to the Ben Franklin Effect, where people justify their actions by convincing themselves they like the person they helped.
Step-by-step explanation:
According to lecture, Mr. Flitch's reaction to Edwin asking for a vacation with pay, despite being underwhelmed with his job performance, could be influenced by the Ben Franklin Effect. The Ben Franklin Effect suggests that when we do a favor for someone, we tend to like them more because we justify our actions by believing that we must have rewarded them for a reason. Thus, the correct answer is that Mr. Flitch will believe he likes Edwin more if he has rewarded Edwin, aligning with the first option: Mr. Flitch will believe he likes Edwin more if he has rewarded Edwin, as per the Ben Franklin Effect.