Which of the following best explains why dorothy's dog pants? a. panting increases insulation inside the dog's mouth, which decreases evaporation and cools the dog. b. panting causes the dog to create excess saliva, which the dog swallows in order to stay cool. c. panting causes the dog to shiver and increases heat production inside the dog's mouth. d. panting increases airflow in the dog's airways, which increases evaporation and cools the dog.