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

How to can salmon
Scale the fish.
Wrap a towel around the salmon's tail and hold the fish in place by the tail. Run the back of a butter knife along the body of the fish, working from the tail toward the head.

OPT:
(I) Cup one hand beneath the fish's belly, then finish the process by moving the knife upwards. Only cut around the perimeter of the salmon's belly, cutting just above the crescent moon, and then cut back towards the head.
(II) Circle the head and the open end of the fish in long strokes with a wet knife to scrape away any larger flakes of flesh on the skin. Score the surface with the sharp kitchen knife by sawing through the individual pieces more easily and efficiently than a wire knife.
(III) Drag the butter knife along the backbone, stopping again when you reach the crown. For medium-sized salmon, from 3-4 inches (7.6-10 cm) in length, use more butter for larger-sized salmon.
(IV) As you scrape the knife along the body, you'll remove the scales. When you finish the first side, turn the salmon over and repeat on the other side until you've scraped off all the scales.
(IV)