The earliest possible hominin found to date has been given the name __ and was discovered in __.

a. Ardipeithecus / East Africa

b. Sahelanthropos / Central Africa

c. Australopithecus / the Rift Valley

d. Orrorin / the Fayum

Sahelanthropus

Explanation:

Sahelanthropus is the oldest known possiblle hominin (usually referred to as a proto-hominin) that has been found to date; Its fossils date back about 7-6 million years. It lived in west-central Africa, just after our ancestor diverged from chimpanzees and bonobos.