PLZ HELP FAST!! Which explains what happens to a warm air mass at a warm front? A. A warm air mass overtakes a cold one, and the warm air gradually rises and cools. The water in the air condenses to form clouds and moderate precipitation. B. A warm air mass overtakes a cold one, and the warm air rapidly rises and cools. The water in the air condenses to form clouds and severe thunderstorms. C. A cold air mass overtakes a warm one, and the cold air gradually sinks and warms. The water in the air condenses to form clouds and moderate precipitation. D. A warm air mass overtakes a cold one, and the warm air gradually rises and cools. The water in the air condenses to form clouds and severe thunderstorms.