Malik Raises His Eyebrows and Whistles When a Friend Picks

Malik raises his eyebrows and whistles when a friend picks him up in a new car. Which statement accurately describes this communication?

A) His eyebrow movement is nonverbal, and the whistle is verbal.
B) His whistle is verbal only if other people hear it.
C) Both his eyebrow movement and his whistle are nonverbal.
D) His whistle is nonverbal, and his eyebrow raising is verbal.