The correct statement about the Chechen independence movement from the options provided is:
"Stalin accused Chechens of being Nazi collaborators; Chechnya has major oil and gas reserves."
This statement highlights two key points:
1. Stalin accused Chechens of being Nazi collaborators, which refers to a historical event where Stalin forcibly exiled the entire Chechen and Ingush populations accusing them of collaborating with Nazi Germany during World War II.
2. Chechnya has major oil and gas reserves, indicating the strategic importance of the region due to its significant energy resources.
These two factors have played a role in shaping the Chechen independence movement and the geopolitical dynamics surrounding the region.