A rocket leaves Earth's surface from rest with a constant net acceleration of 21.7 m/s². After 4.0 seconds, the rocket motor turns off, and then the rocket continues to coast upward with no appreciable air resistance. What maximum elevation above the surface does the rocket reach?
Select one:
A. 725 m
B. 698 m
C. 372 m
D. 558 m
E. 465 m