Task: Question Answering
Input (English): In 1783, Europe was unusually cold and foggy. The rain was acidic. Which event most likely caused the unusual climate in Europe that year?  
 (A) A logging company deforested millions of acres in South America. (B) A major earthquake and tsunami changed the path of the Gulf Stream. (C) A major volcanic eruption released ash and sulfur gas into the atmosphere. (D) An increase in the use of automobiles released more carbon dioxide into the atmosphere.
Output (English): C