A logging company deforested millions of acres in South America. A major earthquake and tsunami changed the path of the Gulf Stream. A major volcanic eruption released ash and sulfur gas into the atmosphere. An increase in the use of automobiles released more carbon dioxide into the atmosphere.
I am hesitating between 4 options to answer the following question, which option should I choose?
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?
Possibilities:
- A logging company deforested millions of acres in South America.
- A major earthquake and tsunami changed the path of the Gulf Stream.
- A major volcanic eruption released ash and sulfur gas into the atmosphere.
- An increase in the use of automobiles released more carbon dioxide into the atmosphere.

A major volcanic eruption released ash and sulfur gas into the atmosphere.