Multi-choice problem: Continue writing the next sentence in this paragraph:

How to fillet salmon
Rinse the salmon in cold running water.
Make sure the fish is completely washed on all sides.
Open the belly.

Pick from: (I). Place the fish on its side on a large cutting board. Hold the tail down with one hand, and with the other insert a fillet knife into the vent, or the anus, located on the underside of the fish near the tail.; (II). Take out the tail, but do not lift it out of the water. Place the fish on a cutting board.; (III). Remove the inner layers of the thickest part of the salmon, using a slotted spoon to pop the belly out of the bones. Then peel and core the fillets on a plastic grocery bag.; (IV). Use a sharp knife to scrape off the hard outer skin. As you peel the tough outer skin, grind it and remove any tough with a finer food processor, blender, or knife.;
(I).