Gibbons and orangutans are from Asia. Gorillas and chimpanzees are from Africa. How was Charles Darwin able to hypothesize that humans evolved in Africa?

A)He understood that humans and great apes were closely related.
B)He understood that humans and gorillas/chimpanzees are more closely related than humans and orangutans based on anatomical criteria.
C)He understood that humans and orangutans are more closely related than humans and gorillas based on anatomical criteria.