Use the Following Information to Answer the Following Questions

Use the following information to answer the following questions.
Mouse mutations can affect an animal's appetite and eating habits. The ob gene produces a satiety factor (the hormone leptin) . The db gene product is required to respond to the satiety factor (the leptin receptor) .
-When more energy sources are needed than are generated by diet, in which order does the animal draw on stored sources?

A) fat, glycogen, protein
B) glycogen, protein, fat
C) liver glycogen, muscle glycogen, fat
D) muscle glycogen, fat, liver glycogen
E) fat, protein, glycogen