Why Do You Need a Steep Vertical Temperature Gradient in the Atmosphere

Multiple Choice

Why do you need a steep vertical temperature gradient in the atmosphere in order to get hurricane development?

A) If the atmosphere warms quickly with increasing altitude then the humidity will go up.
B) If the atmosphere warms quickly with increasing altitude then the surface air can continue to rise.
C) If the atmosphere cools quickly with increasing altitude then the humidity of the air will decrease.
D) If the atmosphere cools quickly with increasing altitude then the surface air can continue to rise.
E) If the temperature in the atmosphere changes continuously then it will cause turbulence in the air stream.