Pls help which statements are examples of Charlemagne’s achievements?

Choose all answers that are correct.

united a vast realm under the Christian faith

was crowned pope on Christmas day, A. D. 800

became the first emperor of the Holy Roman Empire

Why was the u. s. annexation of hawaii delayed until william mckinley became president? a: the rebels who overthrew queen liliuokalani opposed u. s. annexation. b: the senate did not approve the treaty of annexation until mckinley entered the white house. c: supporters of the nationalist cause were in the majority in hawaii until 1898. d: mckinley’s predecessor, grover cleveland, refused to sign the treaty of annexation.