Hi guys im a bit nervous now so im asking you please tell me if u know!

Which one is best adapted to live in open water in the epipelagic zone, and why? fish a because of its elongated body and powerful tail fish b because of its flattened shape and eyes on the dorsal side fish c because of its streamlined shape and lack of pectoral fins none of these because they are all sedentary

Does anyone know the answers for these

Where is the vascular system located