Sentence Correction

Scientists claim that the discovery of the first authenticated mammal
bones in amber could provide important clues of determining, in addition to
how, when mammals colonized the islands of the West Indies.
A. of determining, in addition to how, when mammals colonized the islands of the
West Indies
B. in the determination of how and when the islands of the West Indies were
colonized by mammals
C. to determine how mammals colonized the islands of the West Indies and when
they did
D. for determining when the islands of the West Indies were colonized by
mammals and how they were
E. for determining how and when mammals colonized the islands of the West
Indies

Any thoughts???

IMO E

A-Wordy.In addition to how is not unnecessarily wordy
B-Passive. In the determination of sounds awkward
C and D is grammatically incorrect and sounds awkward.
What is the OA

Scientists claim that the discovery of the first authenticated mammal
bones in amber could provide important clues of determining, in addition to
how, when mammals colonized the islands of the West Indies.

A. of determining, in addition to how, when mammals colonized the islands of the
West Indies ( wordy )
B. in the determination of how and when the islands of the West Indies were
colonized by mammals ( idiom issue - in the determination )
C. to determine how mammals colonized the islands of the West Indies and when
they did ( they - pronoun issue )
D. for determining when the islands of the West Indies were colonized by
mammals and how they were ( they pronoun issue )
E. for determining how and when mammals colonized the islands of the West
Indies

please, underline the question next time.

i feel it should be E....

blaster wrote:please, underline the question next time.

i second that

betwee D and E
E wins ,
D has pronoun problem and wordy as well