According to the ranking of proven oil reserves provided, which country is third?

• A. Canada
• B. Iran
• C. Iraq
• D. Saudi Arabia

Answer: (B)

Proven oil reserves are the amounts of crude oil that a country can economically extract with current technology and prices, so rankings order countries by the size of those recoverable volumes. Being third means only two countries have larger proven reserves in the list, and Iran has more proven oil than all the others shown. In this set, those two ahead of Iran are typically Saudi Arabia and Canada, which places Iran in third while Iraq and the rest come after. Remember, reserve rankings can vary a bit depending on the data source and year, but for this question Iran sits third.