Answer:
Answer D because that's what helps them digest it
Explanation:
There are two main problems with a grass eating but the main one is this one. The first is that human stomachs have difficulty digesting raw leaves and grasses. Animals such as cows, on the other hand, have a specialized stomach with four chambers to aid in the digestion of grass (the process called rumination). We were created with stomachs to eat multiple other things than grass because that's not a main food source compared to ruminants who have that main food source.
