Answer:
C. cP and mT
Step-by-step explanation:
The United States is one of the largest countries in the world, so its climate is affected by multiple different types of air masses in different regions. The ones that have the biggest influence and over largest portion of the territory are the mT and cP air masses. The mT air masses are maritime tropical air masses. The ones that affect the United States originated from the waters of the Pacific, the equatorial part of the Atlantic, and the Caribbean Sea. They move toward the higher latitudes and heavily influence the coastline areas, both on the eastern and western side of the United States, but mostly its southern coastline. The cP air masses are continental polar air masses. The ones affecting the United States originated from Canada and Alaska, where large, cold, high pressure air masses form. These air masses move southward and have big influence on most of the interior of the country between the Appalachians and the Rockies.