(A) lowering tariff rates
(B) attempting to improve relations with Asia
(C) failing to sign international disarmament agreements
(D) ** refusing to join the League of Nations
EXPLANATIONS BELOW
Concept note-1: -The League of Nations was established at the end of World War I as an international peacekeeping organization. Although US President Woodrow Wilson was an enthusiastic proponent of the League, the United States did not officially join the League of Nations due to opposition from isolationists in Congress.
Concept note-2: -Germany’s resumption of submarine attacks on passenger and merchant ships in 1917 was the primary motivation behind Wilson’s decision to lead the United States into World War I.
Concept note-3: -Which situation was the immediate cause of the United States entry into World War I in 1917? German submarines sank United States merchant ships.
Concept note-4: -The Senate opposition to the Versailles Treaty had arisen mainly in reaction to the collective security provisions in the Covenant of the League of Nations, which was to be established under the treaty. They saw these as an unconstitutional constraint on America’s freedom of action in international affairs.