Motives for U.S. Imperialism in the Late 19th Century

In the late 19th and early 20th centuries, the United States expanded its influence and territory through various imperialistic endeavors. This period saw significant events, such as the Spanish-American War, which marked a turning point in U.S. foreign policy. The war resulted in the U.S. acquiring territories such as Puerto Rico, Guam, and the Philippines. Understanding the motivations and consequences of U.S. imperialism during this time is crucial for grasping the larger context of American history.

Which of the following factors most significantly influenced the U.S. decision to engage in imperialism during this era?