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

How to make a mushroom omelette
Wash the mushrooms and cut them into thin slices.
You can leave the stems on, or discard them. Be sure to scrub the mushrooms with a soft-bristled brush to remove any dirt.

Select from the following.
I. Wash the mushrooms with lukewarm water and dry them on a paper towel. You can leave the mushrooms whole or chop them into small chunks to eat later..
II. You don't need to peel them. Heat 1 teaspoon (5 grams) of unsalted butter in a medium-sized frying pan over medium heat..
III. Saute them overnight in the pan. You'll know that the mushroom is done when it's lightly-browned on one side and crispy on the other..
IV. Make sure that you rinse all of the mushrooms before you cook them. If you don't have a sharp knife, you can use a vegetable peeler, a pastry knife, or a combination of both..
The answer is:
II.