The fossil Sahelanthropus tchadensis from the Djurab Desert of Chad,dated at 6 to 7 million years ago,may be a hominin (i.e.,share more recent common ancestry with humans than with any other ape because of ________.
A) its relatively large brain
B) the shape of its thighbones
C) its sophisticated use of stone tools
D) fossil footprints showing bipedal locomotion
E) its relatively flat face