Answer:
The correct answer is option B. "cP".
Step-by-step explanation:
The Continental polar (cP) air mass, also known as continental arctic (cA) air mass, is characterized by having a cold, dry and stable trajectory. The cP air mass originates in Siberia, as well as northern Canada and Alaska, as a result of radiational cooling. Just like most air masses, cP air mass is subsequently altered once it leaves its origin by moving into places where the sun angle is higher.