In figure 20-1, which air masses would be associated with cold, wet conditions?

The air masses that would be associated with cold, wet conditions would have to be A and D.

Hope this helps!!

Based on the given figure above, figure 20-1, the air masses that would be associated with cold wet conditions are A and D. On the same figure, the characteristics of the air mass labeled F are both A and C. I hope that this is the answer that you are looking for. 

Freshwater ecosystems