Hi angel123, you're on the right track!
But there's more.
Doris notices a correlation between people who are in student government and people who are outspoken. I used the word "everyone" to identify this as correlation. Doris then posits (offers) a causal relationship that student government makes people more outspoken. Here I used the phrase "if you want ____, then you should _____" to identify the causal reasoning.
Zack turns around the causal reasoning and says that it was being outspoken that caused people to join student government. And so, encouraging people to be in student government won't make people more outspoken.
What do they disagree about? The causal reasoning. Doris thinks thats student government causes people to be more outspoken, while Zack believes it's the other way around. Doris would agree with answer choice (C), while Zack would disagree.
Incorrect Answers
(A) is out of scope. Neither have an opinion about what should be the case.
(B) is out of scope. Neither have an opinion about what should be the case.
(D) is half scope. Dorris would agree, but Zack doesn't have an opinion.
(E) reverses the relationship. Neither says that being involved in student government is necessary for students to become more outspoken.
#officialexplanation