Question

Koryo built a wall at the Yalu River in the eleventh century to help keep out what enemy?

HISTORY OF KOREA

a. Khitans

b. Chinese

c. Manchurians

d. Jurchens

Answer 1

#1) Koryo built a wall at the Yalu River in the eleventh century to help keep out what enemy?

Answer: The reason why koryo built a wall at the Yalu River in the eleventh century was to help keep out Khitans. Out all the options A) is the correct choice.

I hope it helps, Regards.