Thunderstorms Typically Form in the Summertime During the Warmest Part

Multiple Choice

Thunderstorms typically form in the summertime during the warmest part of the day when the surface air is most unstable. In what part of the United States are thunderstorms most common in the winter and spring due to an inversion that inhibits the development of cumulus clouds?

A) In the valleys of Central and Southern California
B) In the Great Plains, bordering the Rockies
C) In Appalachia
D) In New England
E) In central Florida