Answer:
Prior to World War I, American diplomats were most concerned about:
Mutual Defense Alliances.
American diplomats were worried about the proliferation of mutual defense alliances in Europe, particularly the Triple Entente (France, Russia, and Britain) and the Triple Alliance (Germany, Austria-Hungary, and Italy). These alliances created a complex web of obligations and entanglements that could potentially draw the United States into the conflict.
Step-by-step explanation: