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

How to make a vanilla milkshake
Pour the milk into a blender.
You can use any type of milk you want, including low-fat, whole, almond, or soy. Whole milk or 2% milk will give you the most flavorful milkshake, however.

Pick from: (1). You can make the milkshake as large or as small as you want. For example, if you want a medium-size punch, you may want to make it a super-sized punch. (2). If you use whole milk, lower the blender's temperature to about 100 degrees fahrenheit (or 135 degrees celsius). Do not refrigerate the milk. (3). If you only have skim milk, but would like something richer, add a splash of half-and-half or heavy cream. For a thicker milkshake, use only cup (120 milliliters) milk. (4). Blend on high speed for one minute. After adding the milk, consider pulsing on low speed for several seconds to ensure that the milk heats evenly.
The answer is:
(3).