Plz 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.