I think it may be C. Objects can give people power
Answer:
Constancy
Explanation:
Among the different conceptual blocks that restrain us from being creative and change, constancy is the one indicating that once we have found out how to solve a problem, we stick to that solution to solve other similar problems. This is when it becomes hard to set that solution aside and go for a different one. In this case, Harry does not want to change his study method even though it has not worked well for him on his last exam.
Theme is the message carried out to the audience