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.
Answer:
d. simplicity, relevance
Explanation:
Informative speech is the type of speech that has the aim of educating an audience about a particular topic.
Therefore, some of the principles of effective informative are simplicity and relevance which means that the speech should be simple and relevant to what the speech is about.
I believe the answer is C. All of these. Let me know if this helped.
Built is a past tense verb