Question

which nation did china agree to trade with in the open door policy?
the united states
the philippines
france
britain

Explanation:

The Open Door Policy was mainly advocated by the United States to ensure equal trading opportunities in China among foreign powers. The Philippines was a U.S. colony and not a major power in the context of the Open Door Policy's initial trade agreement with China. France and Britain were already involved in China's trade scene, but the key nation that China agreed to trade with under the Open Door Policy (in the sense of the policy's advocacy and initial agreement - related context) was the United States.

Answer:

A. the United States