During the three kingdom’s period, were built throughout korea.
a.
terracotta soldiers
c.
exquisite palaces
b.
large mounds
d.
artificial tunnels

During the Three Kingdom's period, were built throughout Korea.

b. large mounds

I know this is really late but it should help others out in the future.

The Correct Answers is B

Large mounds

Explanation:

Three Kingdoms Period. Presently as the title suggests, there were three governments during the Three States Era, Wei, Shu, and Wu.The Three states War took region among the Han Dynasty and the Jin Dynasty, beginning in the age of 220 AD  and finished in 280 AD when Wu was destroyed by the Court of Jin.Civil wars occurred out and separated the country into three kingdoms.

Answer//arthritis;

B. i believe the answer is b