Why Do Sheep Have a Much Longer Small Intestine Relative

Why do sheep have a much longer small intestine relative to their size than dogs do?

A) Sheep are generally larger than dogs, and the larger the animal, the larger the relative size of their small intestine.
B) Dogs have sharper teeth than sheep, so they do not need to absorb food only through their small intestines.
C) Sheep eat relatively nutrient-poor food, and a long intestine allows more complete absorption of the available nutrients.
D) Dogs have a simple stomach, whereas the sheep stomach is fairly complex.