The correct option is D Both A and B
Ruminants are herbivores because their bodies (sharp incisors, small canines, peculiar digestive system) are developed in such a way that :
1. They completely depend on plants for their nutrition.
2. Their digestive systems can digest cellulose.
Not many animals have the capability to digest cellulose.
Almost all animals are capable of locomotion hence it is not a characteristic of Herbivores.
So the correct answer is 'Both A and B'.