Answer;
The U.S. wanted to eliminate the spheres so they would not be shut out of doing business with China.
Step-by-step explanation;
The United States want to eliminate spheres of influence in China because they wanted to eliminate the spheres so they would not be shut out of doing business with China.
Sphere of influence is an area where a foreign country controls economic development
The U.S. was interested in China because the American leaders were excited by the vast Chinese markets. Like oil, textile industry, and steel.