What effect did reunification have on germany international rule?

B. It led to the dissolution of the Warsaw Pact.

C. It allowed the Soviet Union to expand into Eastern Europe.

D. It resulted in the decline of the US economy.

The correct answer is B.

The reunification of Germany in 1990 led to the dissolution of the Warsaw Pact, a military alliance between the Soviet Union and its satellite states in Eastern Europe. This was a significant event in the Cold War, as it marked the end of the Soviet Union's dominance over Eastern Europe.