AY YO
What development in Korean culture occurred during the Koryo dynasty
A. advances in metal casting
B. introduction of Buddhism
C. emergence of a textile industry
D. creation of Hangul

Issa lot of points

B. introduction of Buddhism

Explanation:

There exists a similar question where the four most important requirements are given and they are (1) Give charity to the needy, (2) make a pilgrimage, (3) Fasting during the month, and The answer is C.

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ΘΠΤ

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because it took place after the war of 1812 had come to an end.