If an Object Is Dropped from a High Cliff or a Tall

Multiple Choice

If an object is dropped from a high cliff or a tall building, then the distance it has fallen after t seconds is given by the function $f ( t ) = 16 t ^ { 2 }$ Find its average speed (average rate of change) over the interval between $t = c \text { and } t = c + h$

A) $- 16 h$
B) $32 c + 16$
C) $32 c - h$
D) $16 c - h$
E) none of these