Ineed the answer tonight,
why agreement on politics is one of the factor that contribute to a successful marriage?

most likely, when people have the same core beliefs and values, they will probably have considerable less amount of disagreements/arguments, and be able to bond with their shared beliefs and commonalities, as having things in common, such as politics, contributes to successful relationships in general. also politics is definitely a subject that divides people, so if they agree they're more likely to get along well with each other.

answer; i do believe that the correct answer is (b)