Which of the Following Statements About Orangutans Is True

Which of the following statements about orangutans is true?

A) As is typical of arboreal species, the orangutan exhibits little sexual dimorphism.
B) Orangutans used to live over much of Asia but now are found only on two islands in Indonesia.
C) The large size of the orangutan protects it from extinction.
D) Orangutans are less arboreal than gorillas.
E) Orangutans are the most sociable primates.