Joe and Bill Throw Identical Balls Vertically Upward

Multiple Choice

Joe and Bill throw identical balls vertically upward. Joe throws his ball with an initial speed twice as high as Bill. If there is no air resistance, the maximum height of Joe's ball will be

A) two times that of Bill's ball.
B) roughly 1.4 times that of Bill's ball.
C) eight times that of Bill's ball.
D) four times that of Bill's ball.
E) equal to that of Bill's ball.