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This study does not settle the issue once and for all but rather moves the century-old debate to a new level of scientific detail. Computer models patterned on the condition of the Maine before and after the explosion show that a fire in the coal bunker could have generated sufficient heat to touch off an explosion in the adjacent magazine. On the other hand, computer analysis also shows that even a small, handmade mine could have penetrated the ship’s hull and set off explosions within. On what might have caused [the hull] to buckle inward, the evidence is inconclusive.

–Thomas B. Allen,
“Remember the Maine?,”
National Geographic,
1998

What is the most significant piece of evidence related to the sinking, according to this passage?

Computer models show different possible scenarios and inconclusive evidence.
Fire in a coal bunker most likely created enough heat to start an explosion.
The supply of ammunitions played a part in the explosion aboard the ship.
A small mine most likely cracked the ship’s hull and set off an explosion.