Emma built a model rocket, and after running out of fuel at a height of 450 feet with an upward velocity of 100 feet per second, which equation can be used to find how many seconds it takes for the rocket to hit the ground?
A. h = -16t² + vt + s
B. h = 16t² + vt - s
C. h = 16t + vt + s
D. h = -16t² - vt + s