Hot-summer climates in North America

/in /by

Which air masses influence the humid continental hot-summer climates in North America?
A) continental polar (cP) and maritime tropical (mT), especially in winter
B) continental polar (cP) year-round
C) continental polar (cP) and continental tropical (cT), especially in summer
D) continental polar in summer (cP) and continental Arctic (cA) in winter
E) continental Arctic (cA) year-round