Multi-select: Knowing that "as the amount of food an animal eats increases , the weight of that animal will increase", how would one answer "John's dog seemed to be getting chubby. He concluded that"

OPT:
A). the dog was sleepwalking..
B). the dog was getting more exercise.
C). the dog was overindulging in meals and snacks.
D). the dog was refusing to eat....A:
C).