I think the correct answer from the choices listed above is the third option. The statement that best explain the purpose of Robinson's letter is to request immediate action from President Eisenhower in furthering equal rights for African Americans. Hope this helps.
It relies on the readers ethics (what they believe is right or wrong)
This has a subject as in a predicate. A predicate has to verbs which is going to make your answer (___) compound. So without all the confusing verbs and predicates, your answer would be (compound)
