Dan uses a remote control to make his drone take off from the ground. Function h represents the height, in feet, of the drone t seconds after it begins flying.
h(t)=-16(t-2)^2+64

Which statement correctly describes this situation?

A.
The drone is on the ground at 2 and 4 seconds.
B.
The drone is on the ground at 0 and 2 seconds.
C.
The drone is on the ground at 0 and 16 seconds.
D.
The drone is on the ground at 0 and 4 seconds.