What is the answer to number 7, 8, and 9?

number 7: Czar Nicholas II was the last czar, and Russia replaced him with a communist government.

number 8: The treaty of Versailles was the treaty that brought world war 1 to an end.

number 9: Woodrow Wilson came up with the idea of the league of Nations,  The League's goals included disarmament, preventing war through collective security, settling disputes between countries through negotiation diplomacy and improving global welfare.

d. the right to establish a one-house legislature

where's the