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

How to make a m&m brownie sundae cake
Place aluminum foil in and around two 9-inch cake pans.
Be sure that a little foil extends over the edges. This portion will help you pull out the cakes easier at the end.

OPT:
(a). Place two popsicle sticks into each cavity of each cake pan. Take one popsicle stick and set it in the center.
(b). Place the tupperware in the outer bowl of one of the 9-inch pans. The plastic it will be placed over is just to aid with the icing.
(c). Get a little vegetable cooking spray and shoot a light film on the foil. Look at the back of your brownie mix package and preheat your oven to the directions.
(d). Make sure that the bowl of brownies isn't too tall. The brownies will still taste amazing at room temperature and need to be helped to shrink.
The answer is:
(c).