I am pretty sure the answer is B hope that helped
Answer:
D
Explanation:
A-C would make great details in the report, but they do not explain his opinion on the topic (the VALUE of field trips).
Answer: They wanted to prove that segregated buses were illegal.
Explanation: 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.
Based on the details in the the purpose is to inform