A Strictly Herbivorous Animal Is Examined and Found to Have

A strictly herbivorous animal is examined and found to have a short, uncomplicated gut. Its diet must therefore consist of

A) small amounts of low-fibre, high fat material able to be processed by a simple gut.
B) fatty acids and lipids.
C) small amounts of leafy material, mixed with chelated mineral nutrients.
D) large amounts of plant material processed quickly, extracting only some of the available nutrition.
E) large amounts of plant material, processed slowly via fermentation and gut flora action.