Question

unit 1 quiz
what action did the ming dynasty take to limit invasions from nomadic groups like the mongols, manchus, and xiongnu?
it removed the chinese civil exam system
it removed the teaching of confucianism
it finished the construction of the great wall
it created an alliance with japan and korea

Explanation:

The Ming Dynasty strengthened border - defense by finishing the construction of the Great Wall to keep out nomadic groups. Removing the civil exam system or Confucianism teaching had no relation to defense against nomads. Creating an alliance with Japan and Korea was not a measure against these nomadic groups.

Answer:

It finished the construction of the Great Wall