Here's a problem to solve: Nearly 100 years ago, a large volcano erupted in the South Pacific. The following year, Boston recorded measurable snow every month of the year, and most of the Northern Hemisphere experienced a cold summer. Which explains how these two events were related?

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

- A: The eruption intensified the greenhouse effect.
 
- B: Lava flow from the eruption caused a temporary increase in Earth's total heat energy.
 
- C: The eruption caused damage to the ozone layer.
 
- D: Air pollution from the eruption caused a decrease in the amount of solar energy reaching Earth.
 