The correct answers are A) Writing System and C) Buddhism
Explanation:
China has always exerted a strong influence in the region due to its sheer size. Modern research proves how Buddhism, that was actually imported from modern-day Nepal, spread across China and eventually reached the Korean peninsula.
We also clearly identify the Chinese writing system that became popular in Korea and shaped the region for more than a 1,000 years.
As thousands of Koreans immigrated to Japan, they brought these two with them.
Some researchers even believe that rice growing as well as pottery-making and metallurgy came to Japan, through Korea, from the Chinese.
