When the han dynasty conquered korea, the han rulers established
a a new government.
b a new religion.
c universities.
d feudalism.

The correct answer is option A. "a new government". When the Han dynasty defeated Wiman Joseon in 108 BCE,  a new government in Korea was established by the Chinese. This government included the designation of four commanderies in the northern Korean peninsula, and a state called Jin in the southern part of the Korean peninsula.

map scale refers to the relationship (or ratio) between distance on a map and the corresponding distance on the ground. for example, on a 1: 100000 scale map, 1cm on the map equals 1km on the ground.