Multi-select problem: How does the next paragraph end?

How to make champagne cupcakes
Gather your equipment.
To make champagne cupcakes, you will need one large mixing bowl, one small mixing bowl, a hand mixer, a whisk, a large spoon, a cupcake pan for 12 cupcakes , 12 paper cupcake liners, a cooling rack, and an oven.
Preheat the oven and prepare the cupcake pans.

OPT:
[a]. Start by warming the preheated oven to 350 f (177 c). Spread cupcake liners on a cookie sheet, greased at this temperature, to prevent sticking.;
[b]. Turn the oven on to 425 degrees f (102 c). Next, line two cupcake trays with parchment paper.;
[c]. Make sure they are set to medium heat and ready to be sprayed with nonstick spray. Pour a cup of water into the cupcake pans.;
[d]. Preheat your oven to 350 degrees fahrenheit or 177 degrees celsius. Get out your cupcake pan and place one paper liner in each spot in the pan.;
[d].