Who conducted a research program on racial identity and self-concept issues for black children that was cited in the 1954 supreme court decision to end racial segregation in public schools?

The correct answer is: Kenneth and Mamie Clark.

Explanation:

Kenneth and Mamie Clark were a married couple of African-American psychologists that studied children's attitudes about race using white and black dolls and made huge improvements for racial equality. Their contribution was key in the decision of the Supreme Court in the Brown v. Board of Education case, which made racial segregation in public school unconstitutional.

not  

cuba  

russia  

iraq  

el salvador  

explanation:

known as the land of volcanoes, el salvador has visit seismic tremors and volcanic movement. it is the main nation in central america that does not have a coastline on the caribbean sea. about portion of all salvadorans live in the wide open. they are poor and don't have power or running water in their homes. in 1525, pedro de alvarado, a lieutenant of cortés's, vanquished el salvador. el salvador, with alternate nations of central america, pronounced its freedom from spain on sept. 15, 1821, and was a piece of a league of central american states until the point when that association broke up in 1838.