In the 1500s, what was China's policy regarding trade with foreign cultures?

Hello there.

In the 1500s, what was China's policy regarding trade with foreign cultures?

China sold goods but took only silver in payment.

The choices can be found elsewhere and as follows:

China traded freely with other cultures.

China traded only with other Asian cultures.

China sold goods but took only silver in payment.

China imported but did not export goods.

I believe the correct answer is the third option. In the 1500s, China sold goods but took only silver in payment. Hope this answers the question.