<p>The answer says to replace WHEREAS with UNLIKE, but would it also be correct to put WHILE there?</p>
<p>no, because the use of while would induce a comma splice in that case- u would need a depended clause there, not just a phrase, for while to work.</p>
<p>Ohh, I see why now. WHILE would ok if it didn't have "who" in there. Got it :)</p>