Gorbachev's policies of perestroika and glasnost meant a. military growth and isolationism. b. nationalism and rebuilding. c. restructuring and openness. d. welfare and socialism.

C. restructuring and openness

Explanation:
Unlike those before him, Gorbachev tried to open up the Soviet Union to other countries and to help Soviets that were struggling to survive. Gorbachev knew that if he didn't do anything, then the Soviet Union would collapse, hence why he worked to restructure it. Despite his efforts though, the Soviet Union collapsed anyway in 1991.

Con respecto a la producción cultural y científica de Mesopotâmia, es correcto afirmar que la antigua mesopotamia fue la cuna de los avances más modernos en la producción cultural y científica. La antigua mesopotamia lideró al mundo en escritura y prensa, sistema de numeración e ingenio médico, entre otros, y llenó una brecha de conocimiento importante en la historia humana.