A tornado is a type of servere cyclone. Which statement best explains how tornado might form?
A) A cyclone ratates faster and faster as pressure differences between areas of low and high pressure increase.
B) Cold, dense air flows toward warmer, less dense air, so the cold front ends up moving faster than the warm front.
C) Two different air masses meet, but neither moves into the other one, and a spiraling wind results.
D) A cyclone becomes slower and slower as pressure differences between areas of low and high pressure decrease.