Suppose You Develop a Scale of Measurement for Your Preferences

Suppose you develop a scale of measurement for your preferences on music, such that you give country music a rating of 10 on an open-ended scale, and classical music which you are neutral about) you give a rating of zero. Since you like pop music twice as much as you like country music, you give it a number twice as large, a rating of 20. Since you dislike Rap music, you give it a rating of -10, to show that you dislike Rap music as much as you like country music. This scale of measurement would be

A) nominal
B) ordinal
C) interval
D) ratio