More adeptly handling responsibilities than his
predecessors were, the new owner of the
property rapidly increased the production rate of
the land.
(A) More adeptly handling responsibilities
than his predecessors were
(B) Being that he was more adept at handling
responsibilities than were his predecessors
(C) Handling more adeptly responsibilities
than are his predecessors
(D) More adept than his predecessors at
handling responsibilities
(E) Since he handled responsibilities in a
manner more adeptly than had his
predecessors