What happens next in this paragraph?

How to make a shake 
Soften the ice cream. 
There are three good ways to soften up ice cream for use in a shake. You can transfer the tub of ice cream from the freezer to the refrigerator for 20 to 30 minutes.
Choices: [I] Pay attention to how it melts--if you freeze the mixture for too long, the ice cream will loosen. If you freeze the mixture for longer than 20 minutes, the ice cream will melt and will probably end up very sticky.. [II] You can also consider freezing the ice cream overnight. This will help to soften it up further and give it a more spreadable color.. [III] Another option would be to take the ice cream out and let it sit at room temperature for 10 to 15 minutes. If your ice cream is very hard, put it in the microwave for about 30 seconds, setting the power to 30 %.. [IV] You can use a microwave safe bowl, as long as the ice cream is at least partially melted, or you can let the ice cream harden overnight and transfer it to a food processor to puree. Or you can simply refrigerate the ice cream in an airtight container for two to four hours to harden..
[III]