Rewrite the sentence adding a nonrestrictive element using parentheses. Ronald Reagan was the fortieth president of the United States.

Ronald Reagan was the fortieth president of the United States.

Explanation:

Ronald Reagan, originally an American actor and politician, became the 40th President of the United States serving from 1981 to 1989.

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.