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

How to make rice krispie monster treats
Prepare a 9 x 13-inch baking pan.
You can choose to grease the pan by spraying non-stick cooking spray all over it, or you can cover the pan with parchment paper.
Melt the butter in a medium-sized pan over lower heat.

Choices: 1. After melting the butter, pour in the rice krispies. Let the rice krispies sit for 2 to 3 minutes so they melt completely. 2. Stir gently with a rubber spatula until fully melted. Fold in the marshmallows and mix once more until the marshmallows melt. 3. Lower the temperature a little while you are heating the butter and keep an eye on it. Add the onions, vegetable stock, and yam puree to the pan. 4. Make sure you cook at medium speed so the butter bakes evenly. A butter vacuum is great for quick both the cooking and the filling.
The answer is:
2.