In his opening paragraph, King says that he rarely pauses to answer criticisms, but he is replying to "A Call For Unity" because a
their letter shows them to be extremists.
b
he wants his letter to bring about change.
c
their actions were unwise and untimely.
d
he believes them to be sincere and good.

d . he believes them to be sincere and good.

Explanation:

“A call for Unity” was written by eight white pastors who gave their opinions on Martin Luther King Jr. and his actions. They wrote that they essentially agreed with King’s causes, but not with the method of “extreme measurements”. They called King out as an “outsider” because he protested instead of taking the problem to the court.

King recognized their well-meaning attitude and the ways they agree with the ideas. This is why he said, at the end of the "Letter from a Birmingham Jail" he will take time to reply to them. He writes about how he feels their genuine goodwill and capability for understanding. Although he mentioned he does not have time for answering criticism usually, this recognition of the sincerity and good means made him change his principle.

The correct answer is D I'm positive

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explanation: