Which animal would be expected to have the longest digestive tract relative to its body length?

The digestive tract of an animal that eats meat is about four times the length of the animal’s body. In an animal that eats plants, the digestive tract is about twenty times the length of the animal’s body.

Which animal would be expected to have the longest digestive tract relative to its body length?
A . dog
B . cow
C . house cat
D . lion
E . hawk

Answer: B