Answer:
The most important information given about the Black leaders in this paragraph is that they wanted to take the entire bus segregation issue into federal court, and to do that, they needed the strongest possible case - the arrest of a black rider who was above reproach. Therefore, the correct option is "They wanted to bring the issue of segregation to court."
Step-by-step explanation:
They wanted to prove that segregated buses were illegal. They want to bring it to court but they need the arrest of black rider so they have something to say that is illegal they shouldn't get arrested for something like that and that its illegal. They wanted to bring the isssue of segregation to the court and it states that they wanted to bring the strongest case to court and they wanted to prove to the people that segregated buses was very illegal so I think the boycotted.