When Asian and African nations gained independence, the U.S. was worried that Communism would spread to them.
<h3>U.S. Fears regarding independence of those nations. </h3>
The United States was worried that the Soviet Union would influence those nations to adopt communism.
The U.S. feared more communist nations being established as they feared it would then overwhelm the free market system.
As a result, the U.S. tried to influence these nations away from communism by providing both economic and military aid and sometimes even getting directly involved in wars.
"If the ruling dynasty was wealthy, it would keep the Mandate of Heaven" is the best answer from the list, but it should be noted this was not always the case.