The correct answer is A) businessmen urging the United States to compete with other nations for natural resources.
An example of an argument in support of American imperialism is "businessmen urging the United States to compete with other nations for natural resources."
Under the idea of the "Manifested Destiny," some people in the United States supported imperialistic and expansionistic ideas. Specifically, businessmen think that an imperialistic foreign policy would help the country to be economically dominant over other countries. In the past, there was a kind of debate between political forces in the US about this subject. Particularly, after the new territories gained when the US defeated Spain in the Spanish-America: the Philippines, Guam, and Puerto Rico.