Hydrocarbons play a large role in the Russian economy, as revenue from oil and natural gas production and exports accounts for more than half of Russia's federal budget revenue.
Answer:
The Portuguese were using enslaved Africans on sugar plantations in Madeira,They were able to buy slaves from African merchants in this region in return for cloth, horses, trinkets and salt.
Explanation:
Answer: B
Explanation: Brainiest answer pls