What was the primary factor contributing to the revival of most post-Soviet economies, especially Russia, approximately ten years after their independence?

1) Massive foreign investments
2) Growth in the services sector
3) Export of agricultural products
4) Export of natural resources like oil, natural gas, and minerals

4

The primary factor contributing to the revival of most post-Soviet economies was the export of natural resources like oil, natural gas, and minerals.

Most of these economies, 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. Azerbaijan, Kazakhstan, Russia, Turkmenistan and Uzbekistan are major oil and gas producers. Other countries have gained because of the oil pipelines that cross their territories for which they get rent. Some amount of manufacturing has restarted.