The First Stage of a Single-Cell Thunderstorm Is the _____

Multiple Choice

The first stage of a single-cell thunderstorm is the _____ stage in which _____.

A) occluded;a cold front overruns the slower moving warm front
B) mature;downdrafts cause heavy precipitation and strong,gusty winds
C) dissipating;downdrafts pull cooler air into the cloud
D) open;warm air moves northward along an advancing front,while cold air advances southward
E) cumulus;unstable conditions prevail leading to cumulus cloud formation