Answer:
hi
Explanation:
The Three Kingdoms period started with the end of the Han dynasty and was followed by the Jin dynasty. The short-lived Yan kingdom in the Liaodong Peninsula, which lasted from 237 to 238, is sometimes considered as a "4th kingdom
Answer: major centers of commerce
Explanation: steamboats were known for transporting goods and also moving people around, commerce means transportation of goods and large scale of them
I think its D!!
c and b incorrect
These countries played it smart by attacking Pearl Harbor.