A. twice as much vials in a minute as the old machine, which was decommissioned last year, has.
the machine did fill and not has, wrong answer
B. double the vials in a minute than that the old machine, which was decommissioned last year, did.
the pronoun has no clear antecedent, normally, we are comparing what did the new machine fill compared with what did the new machine did, Wrong asnwer
C. twice as many vials in a minute as the old machine, which was decommissioned last year, filled.
This is the correct answer, as the two things being compared are grammaticaly and logiccaly correct (what didt the new machines fill) compared to ( what the old machine did)
D. as many as twice the vials that the old machine, which was decommissioned last year, has.
it should be filled not has
E. two times the vials in a minute than the old machine, which was decommissioned last year, filled.
this sentence is incorrect, two times than is grammatically incorrect, it should be "two times more or less ..."
Wrong answer