Answer:
President Eisenhower's sluggish response to the civil rights movement, is the right answer.
Step-by-step explanation:
At the time when Jackie Robinson wrote a letter to the then U.S. President Dwight D. Eisenhower, racism was a serious issue. During this time, there were kids who were not allowed to enter the classes for education. For similar reasons, Robinson was complaining to Eisenhower for his sluggish response to the civil rights movement.