Chinese government officials in the Song Dynasty were chosen by .

The civil service exams.

Explanation:

Chinese government officials, during the Song Dynasty chosen by the civil service exams. These exams were open to several candidates, including people from different groups. The examination set up to select officials who were well trained, capable and helped unify Chinese culture. The purpose of the civil service exams was to bring men with literary into the government to stand against the military peoples.

b. they tried to evict the squatters from the area.

so sorry if wrong