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 a. laws were enacted in the aftermath of the plot to make it harder to free slaves,increasing sectionalism