Which of the following statements is NOT a defining characteristic of a 'cold occlusion' (cold front occlusion)?

A
The air mass ahead of the former warm front is colder than the air mass behind the cold front.
B
The cold front lifts the entire warm air mass off the surface.
C
The air behind the occluding cold front is significantly colder than the air ahead of the warm front.
D
Weather resembles that of a cold front, typically involving heavy showers.
E
It forms when the cold front overtakes the warm front.