The correct answer to question number 1 is alternative A) "moral diplomacy"
In very simple words, it means supporting nations who share moral values with the United States.
The correct answer to question number 2 is also alternative A) "imperialism, militarism, and entangling alliances"
Imperialism extends a country's power and/or influence through diplomacy or military force, which was being made and was one of the causes of the war. Militarism is basically the urge of having and maintaining a powerful army ready to be used, and entangling alliances are what made the war a world war.