The right answer is the mandate to marry within one's tribe. Even though Nnaemeka knew that his decision to marry a woman from another tribe would upset his father, he thought that his annoyance would eventually pass away. But he had not realized that his was a decision without precedent, and this caused surprise, indignation, and sadness among his people, who, stuck to tradition, saw in Nnaemeka's act a reflection of their Lord's cautionary teachings ("Sons shall rise against their fathers") and a bad omen ("It is the beginning of the end"), hence illustrating their conviction in the mandate to marry within one's tribe.
Exposition is the answer because they are wrapping the whole story up saying there is no knight like Lochinvar
A moral dilemma is where you have to choose between two things, and you have a moral reason for both choices, but cannot decide which to choose from.
