Answer:
A. hamartia
Step-by-step explanation:
Hamartia is the name given to a situation where a protagonist's "tragic flaw" brings about his downfall. Most of the time, people are a mix of bad and good qualities. This is the case with characters too. Some characters tend to have a single flaw that is particularly dominant and that causes them to fail in their pursuits. A common example is that of Hamlet, whose indicisiveness leads him to tragedy.