Task: Question Answering
Input (English): Scientists have observed an increase in global temperatures over the past 100 years. Which phenomena do scientists believe contributes to the increase in temperatures?  
 (A) an increase in undersea volcanic activity (B) a decrease in the distance between Earth and the Sun (C) an increase in certain gases released during the use of fossil fuels (D) a decrease in the amount of water on Earth due to overconsumption
Output (English): C