In general, American literature can be thought of as somewhat of a "mirror" when it comes to the American identity and culture. It shines a light on the American identity.
The “treatment” that Robinson refers to is most likely the treatment of racial difference. The paragraph above is a fragment of Jackie Robinson letter to President Eisenhower sent on May 13th, 1958. This letter is related to the President Eisenhower's leadership. Jackie Robinson was an American professional baseballer who played in the Major League Baseball.
I say it’s C ! It sounds about right
The speakers admiration for and gratitude to the reaper.