When some people reacted negatively to Jackie Robinson’s presence on the Brooklyn Dodgers, baseball officials

b - those executed came from every social and economic class

to reform the distraught soviet union, the democratization of the communist party was promoted through party secretary mikhail gorbachev's policies of “perestroika” and “glasnost.” perestroika refers to the reconstruction of the political and economic system established by the communist party.

i don't think it's c or d. i think it's either a or b.

hope this .