What three reasons does King provide to support his main argument?

King gives three reasons why it is appropriate for him to be active in working for civil rights in Birmingham even though he doesn't claim permanent residence there.

a) He is president of the Southern Christian Leadership Conference, which is a national organization whose Alabama chapter invited him.

b) He compares himself to the apostle Paul, who was also called to carry the gospel of freedom beyond his own place of birth.

c) King points out that injustice anywhere is a threat to justice everywhere.