Which explains what happens to a warm air mass at an occluded front? a. cold air trapped between two warm air masses is pushed upward and cut off from the surface. as the air rises, it warms, and the water in the air condenses to form clouds and precipitation. b. warm air trapped between two cold air masses is pushed upward and cut off from the surface. as the air rises, it cools, and the water in the air condenses to form clouds and precipitation. c. cold air trapped between two warm air masses is pushed upward and cut off from the surface. as the air rises, it cools, and the water in the air condenses to form clouds and precipitation. d. warm air trapped between two cold air masses is pushed downward. as the air sinks, it warms, and the water in the air condenses to form clouds and precipitation.