Which natural event contributed to violence in Sudan's Darfur region? expansion of the Sahara Desert
a series of earthquakes
the draining of the Sudd
continual flooding of the Nile River

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.