What were gorbechev’s economic reform efforts called?

   Perestroika

Explanation: Perestroika was a series of political and economic reforms in the Soviet Union, originally proposed by Brezhnev, which was conducted by Mikhail Gorbachev. The goal of these reforms that took place between 1986 and 1991 was the transformation of the threefold and bureaucratic economy and its adaptation to world market trends. This did not mean the abolition of a command economy that is characteristic of communism, but an attempt to make the conditions of socialist economy more efficient with the introduction of some market-like elements.

i believe 5 is correct answer

in 550 b.c.e. cyrus the great, the leader of the persians, conquered the medes and united the iranian people under one ruler for the first time. cyrus became the first king of the persian empire and went on to establish one of the largest empires in world.