How did the chinese try to limit european trade and involvement in the mid-1760s?

The correct answer is A) they resisted European trade to the city of Canton.

The Chinese tried to limit European trade and involvement in the mid-1760s in that they resisted European trade to the city of Canton.

The Chinese developed the Canton system to trade with foreign nations such as the British. The transactions were limited to the city of Canton. All the merchants entering the city of Canton for trading purposes has to accept a series of regulations to trade. Thorugh the port of Canton, people traded silk, spices, and minerals. This system was effective from 1760 to 1842.  

The other options of the question were b) they allowed Europeans to live in only two Chinese cities, c) they banned Europeans from trading with the Kung-Hung, and d) they allowed only vacationing Europeans to visit China.

i also think it is c