After the end of the Cold War, the world has become:

Unipolar

The correct answer is option (2) - Unipolar

After the end of the Cold War the world became Unipolar.

The end of the Cold War left open only two possibilities: either the remaining superpower would dominate and create a unipolar system, or different countries or groups of countries could become important players in the international system, thereby bringing in a multipolar system where no one power could dominate. As it turned out, the US became the sole superpower. Backed by the power and prestige of the US, the capitalist economy was now the dominant economic system internationally. Institutions like the World Bank and the International Monetary Fund became powerful advisors to all these countries since they gave them loans for their transitions to capitalism. Politically, the notion of liberal democracy emerged as the best way to organise political life.