Answer:
I'm assuming that it could be the third one or 'C' It seems like it's the most best answer and more realistic to say at the very least...
Russia has the world’s largest reserves of <u>mineral and energy resources </u>
Since Russia is a very huge country it also is rich in energy resources
It is well know for their natural gases and ranks #2 for largest coal reserves.
Hope this helps! :3
The blockade was supposed to prevent the South from getting resources and support from other countries who would support it such as those in Europe who were ready to recognize it as independent and help it if it meant that in the long run it would help them by weakening the Union.