Read the excerpt from Jackie Robinson’s letter to President Eisenhower.

I respectfully remind you sir, that we have been the most patient of all people. When you said we must have self-respect, I wondered how we could have self-respect and remain patient considering the treatment accorded to us through the years.

Which best explains why Robinson includes this description of African Americans?
to warn the president that African Americans are tired of waiting and will soon take action
to point out that African Americans have greatly suffered for far too long
to assure the president that African Americans would continue to wait patiently
to show that he respects the president and all he has done to help African Americans