Answer:
A) China.
Explanation:
The Open Door policy by John Hay was expressed in the series of notes aimed to avoid the potential threat of dividing China among various sphere of influence by nations primarily by Russia, France, Germany, and Great Britain. Therefore, protection of equal privileges between these trading countries and to support China in its territorial and administrative integrity. Hay claimed that ensuring fair access to trade would favor the American economy, and he hoped the Open Door would also avoid conflicts between China's forces.
B.) <span>Nativists were concerned that immigrants would overrun the country.</span>
