In the United States, tornadoes are most frequent during the ____, and least frequent during the ____.
A)summer; fall
B)spring; winter
C)spring; fall
D)summer; winter
E)winter; fall

Question

Quizplus · Accepted Answer

Tornadoes in the United States are most frequent during the spring when the conditions for their formation (such as the mixing of cold and warm air masses) are most favorable. They are least frequent during the winter when the atmospheric conditions are less conducive to their formation.

In the United States, Tornadoes Are Most Frequent During the ____