Which region of origin for mT air masses has the most impact on North American weather?

Question

Quizplus · Accepted Answer

mT air masses from the Gulf of Mexico have the most impact on North American weather as they are responsible for bringing warm, moist air to the central and eastern parts of the continent. These air masses are a key contributor to the formation of severe thunderstorms, tornadoes, and heavy precipitation events in this region.

Which Region of Origin for MT Air Masses Has the Most