The map describes and shows the movement of air masses over North America. Which does not describe these air masses?

2) Low-pressure systems bring clouds and precipitation.

3) Which of the following occurs as altitude increases?

4) High pressure systems usually bring good weather because .
A) They move from cooler areas to warmer areas.
B) They are consistent in temperature humidity, and pressure.
C) They take on the characteristics of the Earth's surface below them as they form.
D) They can affect the weather of an area when they meet.