Us secretary of state john hay established the policy, which opened china’s ports to european trade.

The correct answer is- THE OPEN DOOR POLICY

c is the correct answer for this question.

the section of the chart that represents a point at which a bill needs approval from a majority of people in both chambers to advance is j, as this is the only section before the bill becomes law which has both rows (symbolizing the chambers) converging into one, meaning that the two parts of the congress have to approve of it before it can march on with the process.