She 's outside tied up for the rest of the day . I have spoken with my vet about this and we almost came close to having a nasty argument over it . He really wants me to believe that my dog ... who eats one of the most expensive well balanced dog / puppy you can buy ... needs the extra vitamins that is found left over in my cat 's ( who eats the cheapest cat food you can buy ) POOP ! I know I do n't have a veterinarian degree - but to me it sounds like complete NONSENSE !
Why does the narrator question the vet 's opinion ?
Pick the best answer from the following options:
A. Because the vet could n't give an explanation .
B. Because the dog eats high quality food .
C. Because the dog gets plenty of exercise .
D. Because the dog dislikes the vet .


B