A. Serving for only eight years
Becuase people would have sex to get rid of the black death
The Lincoln–Douglas debates (also known as The Great Debates of 1858) were a series of seven debates between Abraham Lincoln, the Republican candidate for the United States Senate from Illinois, and incumbent Senator Stephen Douglas, the Democratic Party candidate.
This is part of a letter written by a famous African American, Jackie Robinson.
Considering that he talks about having patience, or not having, and the mistreating of "us" as a group, we can discard anything about activists. Generally, and obviously, blacks were not defenders of segregation and the letter doesn't bring up anything directly about the president.
In fact, he is generally speaking about how his ethnic group has been badly treated throughout the years. So the answer is:
B. the discrimination and bigotry faced by African Americans throughout history in the United States.