I don't understand

@Eugenia-Ouyang, Happy to help. Let's look at (A). (A) says, "at least some other voters in Mooresville do not make the same exception for their own incumbent in the upcoming election" (A) is the correct answer choice because only if some of the people do not vote for their own incumbent in the upcoming election is it possible for the city council to be changed. Does this make sense? Let us know if you have any other questions!

Not sure if I understand the passage correctly. Can someone please break down the argument?

This is a rather silly argument. The author is unhappy with the city council and wants to vote the bums out. Understandable, but their argument is weird. They want to vigorously campaign against all of the other members, but support her representative. She also hopes that everyone else in the city will do the same. There's one major flaw here, if everyone votes to re-elect their rep and campaigns against the rest of the council, then everyone will still be voting for their own rep, and the entire council will be re-elected.