Passage Summary: A ship sank quickly, and normally ships that sink that fast get crushed by water pressure unless they are completely filled with water. Photos show this ship wasn't crushed, so it must have been full of water.

Reasoning: The ship sank rapidly, which usually prevents full flooding, but it did not implode, and only fully flooded ships avoid implosion at great depths.

Analysis: This stimulus functions as a logic puzzle where we must follow a chain of conditional requirements. We know the ship reached the bottom without imploding, which necessitates that it was fully flooded. We also know it sank rapidly, a condition that 'normally' precludes full flooding unless something like sabotage occurs. While we cannot definitively prove sabotage happened, we can definitively prove the ship was fully flooded. Look for an answer choice that reflects this logical necessity based on the lack of implosion.