Final answer:
So the correct answer is Option B. A gummivorous primate is likely to have large molars with shearing crests, small front teeth, and a decrease in bone mass of the skull and face.
Step-by-step explanation:
A gummivorous primate is likely to have large molars with shearing crests, as these are specialized teeth for chewing tough plant materials. Additionally, they are likely to have small front teeth (incisors and canines) and a decrease in bone mass of the skull and face. These traits enable them to efficiently consume and process gum and sap from trees.