Please help me :( What explains the rise of the American Civil Rights movement in the 1950s? How did individuals like Linda Brown, Rosa Parks, and Martin Luther King Jr. help to move the era forward in the 1950s?

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.