This is a test of commonsense with single/multi-choices. Complete the next sentence:

How to cook herring
Preheat the oven and clean the herring.
Turn on the oven to 450 f (232 c). Take 6 herring and use the blunt side of a knife to rub against the scales.

Select from the following.
[+] Next, rinse any bits of the herring off with water. Alternatively, you can cover the herring with burlap sacks and dump the entire batch of herring into a zip-close bag to cool before baking.
[+] As you rub, the scales will soften so that they won't click and sink to the bottom of the pot. This is because you'll be cooking the herring on the bottom of the pot.
[+] The scales should flake and fall off. Slice each herring from its anal fin up towards its head.
[+] If the scales are tough to clean with a knife, you can rinse them under cool, running water. You can use a hard boiled egg for this step.
The answer is:
The scales should flake and fall off. Slice each herring from its anal fin up towards its head.