The Funnel Cloud Characteristic of a Tornado Is Principally Formed

Multiple Choice

The funnel cloud characteristic of a tornado is principally formed by

A) condensation of water vapor in air drawn into the low pressure core of the tornado.
B) dust and dirt picked up from the atmosphere.
C) clouds being funneled by downward air currents coming out of a cumulonimbus cloud.
D) water drawn up from the sea surface into the cloud.
E) gaseous products from intense lightning activity within the tornado.