Which two air masses are bitterly cold and very dry during winter?

Name: Which two air masses are bitterly cold and very dry during winter?
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cA (continental Arctic) and cP (continental Polar) air masses are both known for being bitterly cold and very dry, especially during the winter months. cA originates from the Arctic regions, bringing extremely cold temperatures, while cP originates from high latitude areas over land, also bringing cold but slightly less extreme conditions compared to cA.

Which Two Air Masses Are Bitterly Cold and Very Dry