Which of the following sentences is written in the passive voice?
A. They considered their options.
B. The effects of cyanide are well known.
C. Having left the building, Elvis never returned.
D. I would not provoke that man if I were you.
passive is when something is done to the subject of the sentence by someone or something else. it formed by using the appropriate form of "are" + the third form of a verb. so the answer should be B
