The body of your car is supported by four springs that are themselves supported by four wheels. While driving along a

road, you encounter a bump and your car bounces up and down.

Suppose that the bouncing of the car body continued forever

without diminishing. At which point(s) in its bounces would the

car body have the greatest amount of acceleration?

(A) Its acceleration is greatest at the top and bottom of its
bounce.
(B) Its acceleration is greatest as it passes through
equilibrium on its way downward but not upward.
(C) Its acceleration is greatest as it passes through
equilibrium on its way upward but not downward.
(D) Its acceleration is greatest as it passes through
equilibrium in either direction.