Does the convective rise of airflow lead to precipitation?

Test center: front system and weather topic: analysis: from the changes of air pressure and temperature in the picture, this weather system is a cold front system. A. In the process of air sinking, water vapor is not easy to condense, so sunny days often appear in the area controlled by downflow, which does not meet the meaning of the question; B, the convective rise of airflow is easy to form precipitation, for example, the precipitation in the equatorial region is convective rain, so it does not meet the meaning of the question; C, the cold front is the cold air mass actively moving to the warm air mass. Because the density of the warm air mass is small and the density of the cold air mass is large, the warm air mass is forced to rise, and the temperature of the warm air mass is easy to form precipitation during the rising process, so it is correct; D, the precipitation formed by the warm air mass mainly climbing along the front is mainly warm front precipitation, which does not meet the meaning of the question. So comment C: The key to solve this problem is to be able to distinguish the difference of precipitation formed by cold and warm fronts, and this difference mainly depends on whether the heating mass climbs actively or is forced to rise.