Which of the following sentences is most clearly describing a symbol?

A. The bird that takes flight at the end of the funeral represents Mr.
Warrenson's spirit.

B. Whenever a death occurs in the movie, a discordant bit of music

plays in the background.
C. The reference to Ghandi in chapter 2 suggests that the character
Annibal is peace loving.

D. Several times in the movie, characters open a briefcase, but the
audience never sees its contents.