A Ball Is Thrown Vertically Upwards at 18

Multiple Choice

A ball is thrown vertically upwards at 18.5 m/s.For its complete trip (up and back down to the starting position) ,its average velocity is:

A) 18.5 m/s.
B) 9.3 m/s.
C) 4.6 m/s.
D) ​13.9 m/s
E) ​not given.