Here's a problem to solve: In 1783, Europe was unusually cold and foggy. The rain was acidic. Which event most likely caused the unusual climate in Europe that year?

Among the 4 following options, which is the correct answer?

- 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.
 