Which of the following best states how the open door policy affected china and other countries doing business there?
the open door policy stimulated trade and maintained the influence of foreign powers in china.
the open door policy equally benefited china, the united states, and other foreign powers.
the open door policy increased tax collections in china because of additional trading revenues.
the open door policy benefited the united states because china was grateful for us intervention.

The correct answer is A. “The open door policy  simulated trade and maintained the influence of foreign powers in China”

The Open Door policy stimulated trade and maintained the influence of foreign powers in China.

Explanation:

The Open Door Policy postulated that the same commercial conditions should exist in China for all the great powers. Based on the Unequal Treaties signed between China and the great powers (Great Britain, France, United States, Russia, Japan, Portugal, Germany, Italy, Austria-Hungary, Belgium, Spain and Netherlands) there would be unrestricted access to Chinese commercial markets for this countries.

This policy originated with British commercial practices, which were reflected in commercial treaties with the Chinese Qing Dynasty after the First Opium War (1839-1842).

i think you may have asked this twice, but i answered one of the

answer; (c) slaves brought to the americans from africa;