Which statement is true?

A) The communist system of state-owned enterprises in the Soviet Union was an example of pure communism.
B) Aside from Cuba,Vietnam,North Korea,and a few other very small nations,there are no other communist powers left in the world.
C) Mikhail Gorbachev still holds substantial power in Russia.
D) None of the statements are true.

The statements provided contain inaccuracies or are outdated. The Soviet Union's system had elements of communism but was not pure communism as it involved significant state control rather than a classless, stateless society as envisioned by pure communist ideology. While Cuba, Vietnam, and North Korea are often cited as communist, the global landscape of communism is more nuanced, and the statement oversimplifies the current state of communist powers. Mikhail Gorbachev, who was a significant figure in the late 20th century, does not hold substantial power in Russia today.