Which of the following statements about primates is TRUE?
a. Bonobos are a species of the Great Apes that is known for being somewhat social, but mostly solitary.
b. The dominant male of gorilla populations is referred to as the “silverback.”
c. Strepsirrhines have more protection around their eyes and have a postorbital closure, whereas Haplorhines have little protection around their eyes and only have a postorbital bar.
d. The Great Apes have a smaller body size, long and thin arms, less prominent facial features, and more arboreal adaptations.