"Russia has the world's largest reserves of energy sources", geographical factor is most beneficial to Russia's economy.
Answer: Option C
Step-by-step explanation:
Russia have abundant amount of energy resources with 2nd largest coal reserves and the 8th largest oil reserves. It covered very known natural gas reserves of any state on earth.
It constitutes 32% of the world's confirmed natural gas reserves, 12% of the verified oil reserves, 10% of the discovered coal reserves and 8% of the verified uranium reserves. Russia has gained assets that could be worth trillions of dollars in the Black Sea.