Answer:
Besides isolationism, the Chinese also limited trade with Europe because the Europeans continued to bring their missionaries to convert the Chinese.
Explanation:
The first option is not correct because the Europeans were desperate for trade with China, and they would often even devalue their own goods in order to get Chinese goods.
The second option is not correct because the Chinese didn't had any problem if there were trading ships from other places at their ports.
The third option is not correct because in reality, the Chinese didn't really need anything in particular from the Europeans, so they were in no need for trade with them.
The fourth option is correct because the Europeans insisted on bring in missionaries and attempts to convert the Chinese to Christianity, and this was not seen fondly by the Chinese rulers as they knew that that will have bad consequences in the long run because the Europeans would get a stronghold and big influence in China.