When children become teenagers,
scientists believe that their sense of taste begins to evolve more because
their sense of smell is heightened than because their taste buds change.
A: scientists believe that their sense of taste begins to evolve more because their sense of smell is heightened
than because their taste buds change
their is ambiguous - does it refer to scientists or children? IncorrectB: their sense of taste evolves, scientists believe, more because their sense of smell becomes heightened than
because of their taste buds changing.
their corresponds to children because atleast one occurrence of that pronoun refer to subject clearly, before scientists are mentioned. becomes heightened and taste buds changing are not parallel - IncorrectC: their sense of taste evolves, scientists believe, due more to their sense of smell heightening than their taste buds
changing.
due is awkward and breaks the grammar. IncorrectD: scientists believe that their sense of taste begins to evolve more because their sense of smell is heightening than
because their taste buds are changing.
Same problem as A - their is ambiguous. IncorrectE: their sense of taste begins to evolve, scientists believe, more because their sense of smell becomes heightened
than because their taste buds change.
Correct, IMO. their corresponds to children because atleast one occurrence of that pronoun refer to subject clearly, before scientists are mentioned. becomes heightened and taste buds change are parallel