C. Identify each sentence below as SIMPLE, COMPOUND, COMPLEX, and COMPOUND-COMPLEX yours.
11. Dogs are friendly, but they could also be dangerous.

12. Your dog's sense of smell is 10,000 times better than yours.

13. Dogs can track people, and they could detect dangerous substances.

14. Communication is very important to dogs because it helps them form and maintain social groups.

15. Dogs can see better than humans in the dark, and they have an incredibly well-developed sense of smell, which is far superior than humans.​