Who believes is a good place to make friends?

What is the central idea in this advice from branch rickey to jackie robinson?  

What role should teachers play in creating tolerance environment for students?

What is a generalization? a. a series of events that make up what happens in a story b.hints or clues that tell you what is going to happen in a story c.the final resolution or event that ties up loose ends in a story d. a simple statement about something complicated