C
Below is a question with multiple-choice answers. Choose the correct option based on your reasoning.

### Question:
In 1783, Europe was unusually cold and foggy. The rain was acidic. Which event most likely caused the unusual climate in Europe that year?

### Choices:
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.

### Answer:
