According to The Elements of Style, which sentence is written in active voice?
O
O
O
O
The acceptance speech was given by the award winners.
The pennants were won by the championship team.
A memorable evening was had by all who attended the event.
The workers took precautions while digging along power lines.

D.The workers took precautions while digging along power lines.

Explanation:

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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.