The demonstration passed off peacefully.

Options

A. passed out
B. passed off
C. passed on
D. No Improvement

Answer

B

Explanation

passed pass out (Phr.V.) : faint , to become unconscious : to move past or to the other side of something/ somebody pass away (Phr.V.): die pass on (Phr.V.): to give something to somebody else Here, passed is the right usage