This one is trickier than the difficulty level suggests
Mount Everest is widely recognized as being 8848 meters in height, but research teams from around the world, including Britain, Norway, Canada, and Pakistan, came up with other calculations, which have sometimes strayed a little bit higher, and a little bit lower, compared to that figure.
(A) came up with other calculations, which have sometimes strayed a little bit higher, and a little bit lower, compared to that figure X
(B) came up with other calculations, which have sometimes strayed a little bit higher, and a little bit lower, than that figure X
(C) have come up with other calculations and sometimes strayed a little bit higher, and a little bit lower, compared to that figure X
(D) have come up with other calculations and sometimes strayed a little bit higher, or a little bit lower, than that figure X
(E) have come up with other calculations, which have sometimes strayed a little bit higher, or a little bit lower, than that figure C
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"Do not pray for an easy life, pray for the strength to endure a difficult one." - Bruce Lee