Write the next sentence in the following story.

How to make sour cream chip dip
Use parmesan cheese.
Measure 16 ounces (454 g) of sour cream to a mixing bowl. Then add cup (50 g) of parmesan cheese and 1 tablespoon of dijon mustard.

Options: a). Stir the ingredients until they're fully combined and well blended. You can use brown or white cheddar, or even limoncello.. b). Whisk everything together well so the ingredients are thoroughly combined. Pre-heat the oven to 400f/200c.. c). Stir to combine and then add salt and pepper to taste. Add the salt a pinch at a time, though, since the parmesan is already pretty salty.. d). Bring the mixture to a boil over high heat. Reduce the heat to a simmer and stir frequently... The answer should be
c).