You are analyzing a fossil excavated from a site in Kenya, East Africa. The fossil is dated to about 2 million years ago. The skull has a cranial capacity of about 600 cc. Molars are smaller with thinner enamel than those you have seen with Australopithecus specimens. However, the relative length of the arms and legs seem similar to Australopithecus. This specimen is most likely to be which group?
1) modern Homo sapiens
2) Homo erectus
3) Homo habilis
4) Ardipithecus ramidus
