<p>I honestly don’t know if you are allowed to or not. I picked it mainly because I thought the only other possible answer [‘and the strongest of whom ran and skated’] was awkward and possibly incorrect.</p>
<p>I actually think the two verbs weren’t ‘run’ and ‘skate’, but different ones entirely. I thought the words before the comma were “went skating”.</p>
<p>Who knows. Only 11 more days until we can get our scores. :)</p>