Ranking Preferences

How can I create a question where people rank their preferences? I thought it might be the "number" options, but I can't seem to figure it out.

I can suggest to take a look at Orderable List and Dual Listbox widgets. They allow to rank options. Here is how you can add a widget to a form: How-to-Add-a-Widget-to-Your-Form

Let us know if you need more help.