How does identifying the author's purpose help the reader?

A. It helps the reader pick important terms.

B. It helps the reader memorize the text.

C. It helps the reader respond to the text.

D. It helps the reader know the author.

in "letter from a birmingham jail," king argues that there are four basic steps in any nonviolent campaign: "[c]ollection of the facts to determine whether injustices exist; negotiation; self purification; and direct action." finally, direct action is taken and acts such as boycotts and sit-ins are staged.