A sled with a thruster starts on a hill angles 30 degrees from the horizontal, facing downwards. Underneath the sled is a scale that reads the normal force that the scale must push up on the sled. For the time sequences:
(A) sled before thrusters are turned on,
(B) going down the hill while the thrusters are on,
(C) flying in the air with the thrusters on, and
(D) hitting the snow,
rank what the scale reads from greatest to least.

Give you ranking in the form:
A >B>C= D. Explain the reasoning for your ranking.