Why was the united states motivated to establish the open door policy?

The open door policy is a concept in foreign relations and economy. As a theory, it originally postulated that the same commercial conditions of the great powers in China should exist. Based on the unequal treaties signed between China and the powers there would be unrestricted access to Chinese commercial markets. Therefore, the US was interested in entering bilateral trade with China.

the answer is "by providing data about careers and annual mean wages"

there are hundreds of postives ways to unite a country with another country here are a   few

1 peace treaty's peace treatys

are basically a document signing a allliance with one country and another.

2 gift

what i mean by this is for example how the french gave the americans the statue of libery a gift of peace.