The best explanation of the stance of the Anti-Imperialist League is:
• Expansionism was antidemocratic and anticompetitive.
The Anti-Imperialist League opposed American expansionism, particularly the annexation of territories following the Spanish-American War, on the grounds that it contradicted the principles of democracy and self-determination. They believed that imperialism was contrary to American values and would lead to a focus on competition and oppression rather than democratic ideals.