Assertion: The economies of most of the post-Soviet countries, especially Russia, started reviving in 2000, ten years after their independence.

Reason: The reason for the revival of most of their economies was the export of natural resources like oil, natural gas, and minerals.

Both the Assertion and the Reason are correct and the Reason is the correct explanation of the Assertion.

The economies of most of the post-Soviet countries, especially Russia, started reviving in 2000, ten years after their independence. The reason for the revival of most of their economies was the export of natural resources like oil, natural gas, and minerals.