scientists theorize that tuberculosis may be responsilble for the extinction of the mastodon , aspecies of mammal that lived at the same time as other legendary mammals such as the wooly mammoth ans saber toothed tiger

a.same as underline
B. that had lived at the same time as had other legendary mammals
c.that lived at the same time those others had
d. living at the same time as those others did
e. living at the same time as those were