In his letter, King states that many people must believe that blacks should wait for civil rights to be offered to them and not protest to speed up this process. However, King shows that racism is too violent for people to wait patiently for its end.
Therefore, option B is the correct answer.
Although you haven't shown it, we can see from the context that his question refers to "Letter From Birmingham Jail" written by Martin Luther King.
This letter was written when King was in prison for leading peaceful protests calling for the liberation of civil rights for African Americans.
While reading paragraphs 13 and 14 of this letter, we can see that:
With that, he reinforces that blacks are in a hurry to obtain civil rights because they are in a hurry to get rid of racism and for that reason, protests are important.
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