Which Species is Considered to Be the Most Ancient

Question

Which species is considered to be the most ancient?  
A) Homo erectus
B) Australopithecus afarensis
C) Australopithecus sediba
D) Homo sapiens
E) Sahelanthropus tchadensis

Accepted Answer

Sahelanthropus tchadensis is considered to be the most ancient species in the human lineage based on fossil evidence. It is estimated to have lived 6-7 million years ago and is believed to be the earliest known hominid.