Which of the Following Is MOST Likely to Occur When

Multiple Choice

Which of the following is MOST likely to occur when a cold front intersects a package of warm air?

A) The two air masses mix, and a thunderstorm results.
B) The two air masses mix, and the formation of a tornado is possible.
C) The cold air is lifted on top of the warm air, and a thunderstorm results.
D) The warm air is lifted on top of the cold air, and a thunderstorm results.