What caused islam to split into sunni and shia branches? a- the question of how to spread the islamic faith b- the question of who should lead muslims c-the question of muhammad's role as prophet d- the question of whose teachings are in the qur'an

d.prevent the spread of communism outside of eastern europe.

thurgood marshall

explanation: in 1954, thurgood marshall and a team of naacp attorneys won brown v. board of education of topeka, kansas. in this landmark decision, the supreme court held that segregation in public education violated the equal protection clause of the fourteenth amendment.