During the period of isolationism, why were the chinese successful in imposing new rules governing trade with foreigners?

a. the same rules were imposed by all countries that traded with china.
b. the number of countries that traded with china was limited.
c. foreigners were fearful of china’s military.
d. chinese goods were in high demand.

This is my last question i can how did religious practices of ancient india influence the modern world? a.christianity and islam began in india and are both major world religions. b.hinduism and buddhism began in india and are both major world religions. c.hinduism began in india and developed into more modern indian religious practices. d.buddhism began in india and developed into more modern indian religious practices.