D. THIS VERSION STATES THE IDEA CLEARLY, CORRECTLY, AND CONCISELY,...

15. d. This version states the idea clearly, correctly, and concisely, using parallel structure. Choice aisbulky and awkward with its opening phrase suggested by new research is the fact that; it also has sev-eral superfluous commas. Choice bincorrectly uses thatinstead ofwhoto refer to people, and while itis not wordy, it is not as fluent as choice d. Choice cis wordy, relying on bulky passive constructionsand prepositional phrases. Choice eis incorrect because it lacks parallel structure.