A tennis ball is thrown vertically upward from ground level at t = 0. The ball passes the top of a tree at t = 0.75 s, and 1.50 s later it reaches its maximum height. The height of the tree is

a. Calculated using the ball's trajectory equation.
b. Equal to the ball's initial velocity.
c. Determined by the time it takes to reach maximum height.
d. Dependent on the ball's acceleration due to gravity.