Which of the Following Is True of the Occluded Stage

Multiple Choice

Which of the following is true of the occluded stage of a midlatitude cyclone?

A) it occurs when the cold front overruns the slower moving warm front.
B) it occurs as soon as air begins to be uplifted along the cold front.
C) it occurs at the time when the cold front and warm front are clearly and distinctly separated from one another.
D) this stage is characteristic of an early stage of cyclone development.
E) it occurs when the lifting mechanism is cut off from the warm air mass that was its source of energy and moisture.