Mark hits a tennis ball into the air. He uses the equation shown to approximate the
 height, h, in feet, of the ball t seconds after he hits it.
 h = -1612 + 88t + 4
 What does the 4 represent in Mark's equation?
 A.
 The ball was in the air for a total of 4 seconds.
 B.
 The ball landed 4 feet away from where Mark hit it.
 C.
 The ball was 4 feet above the ground when Mark hit it.
 D.
 The ball reached its maximum height 4 seconds after Mark hit it.