How does the weather change during the pressure rise?

The curves in the chart only show the changes of temperature and air pressure with time, showing that cold and high pressure gradually affect Shanghai, leading to cooling and pressure increase. Generally speaking, when the cold high pressure begins to affect, it may bring strong winds and precipitation, and the weather will clear up after being controlled by the cold high pressure body. However, the amount of clouds in the picture has not changed, so it is impossible to judge whether the weather is sunny during the period, and it is even more impossible to explain that the weather is "always sunny". So d is wrong.