【2016模拟题】阅读下列短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项。
Scientists recently found three animal species living two miles below the surface of the Mediterranean Sea, where the super-salty waters don’t have oxygen(氧). They’re multicellular(多细胞的), which means their bodies have many cells. They each are as small as a large grain of sand. But they are animals.
