Answer Choice

I am having a hard time following this as well

There really needs to be a video explanation for this question lol. The first sentence states that the Renzi, a passenger ship (a ship that carries passengers across bodies of water), sank because of a hole. So we already got a causal relationship and a possible cause was sabotage, so someone might have sunk the ship on purpose. Then it states that in normal circumstances, a ship like the Renzi would sink to the ocean floor before becoming fully flooded but that sabotage can cause the ship to fully flood. The last sentence can be diagrammed as /FF---> implode and the last premise given was that the Renzi did not implode, or /implode. We can link this up to the former statement and we now know the Renzi was fully flooded by the time it reached the ocean floor so it seems likely that sabotage was the cause, although we don't know for certain. And this info is paraphrased in C. Since ships like the Renzi normally aren't flooded by the time they reach the ocean floor, it's unusual that this ship would have been fully flooded before then if it weren't sabotaged.