29.7%, which can be rounded to 30%
        
             
        
        
        
Answer:
The correct answer is c. are relatively larger than humans.
Explanation:
The olfactory bulbs of the sheep are two or three times larger than humans, and therefore, they provide them a greater sense of smell, which in their case, is indispensable for surviving. This serves them for finding food, as well as finding their babies and other things.