Which of the following four pictures correctly represents the cold front weather?

Test analysis:

The judgment method of cold and warm peaks is: the moving direction of cold air mass is active, and warm air is forced to rise; Range of rain area; Rain line direction; The current weather, the figure is mainly judged by the moving direction of cold air and the position of cold and warm air mass: if the cold air is dense and located below the front, B and C are wrong; In the cold front, the cold air mass is strong and active, and the warm air mass is forced to rise. A is correct.