Select the grammatically correct sentence: 1. The cow does not eat anything else. It lives on grass and leaves. 2. The cow does not eat anything else. It lives at grass and leaves. 3. The cow does not eat anything else. It lives in grass and leaves. 4. The cow does not eat anything else. It lives for grass and leaves.

• A. 1
• B. 2
• C. 3
• D. 4