Ordinary thunderstorms only last about one hour and begin to dissipate when
a. lightning neutralizes all the electrical charge in the cloud.
b. when all the precipitation particles in the cloud turn to ice.
c. when the downdraft spreads throughout the cloud and cuts off the updraft.
d. when solar heating at the ground begins to decrease.
e. when clouds scatter due to the microbursts within the storm system.
ANSWER: c
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