What Property of Melamine Led to the Inappropriate Incorporation of This

What property of melamine led to the inappropriate incorporation of this chemical into pet foods?

A) It is a high-fat molecule and therefore made the pet foods better for the pets' skin.
B) It is a flavor enhancer and therefore made it more likely that pets would consume the food.
C) It is a nitrogen-containing chemical and therefore made the pet foods appear to have a higher protein content.
D) It binds acrylamide and therefore prevents that potential carcinogen from being absorbed.