D.THIS IS THE MOST CONCISE AND FLUENT VERSION. CHOICE AINCORRECTLY...

19. d.This is the most concise and fluent version. Choice aincorrectly uses the transitional phrase on theother hand, and because it puts which is commonly known as sugarinto a nonrestrictive clause imme-diately after the appositive glucose, the sentence may be confusing. Choice bis grammatically correctbut quite awkward, using whichthree times in one sentence. Choice cinverts the sentence, making itless direct and therefore less clear. Choice e is correct but less direct and slightly more wordy than dbecause it uses the passive construction (converted by the body).