A topic of geography and weather that I can't understand

As the picture shows, this is a low pressure (cyclone). A picture erected inside tells you that this is

Cold front crossing the border. First, cyclones produce rainfall. AC can rule out that it will not be continuous precipitation because it is a cold front crossing and there is strong convective weather. (Persistent precipitation, mostly due to quasi-static front)

Choose 4 from 2.

Previously, City P was controlled by a heating mass, with high temperature and low air pressure. After that, the cold front crossed the border, the temperature dropped and the air pressure increased.

The correct answer should be this. .