Error ID question.

<p>Mediators were standing by, prepared to intervene in the labor dispute </p>

<p>even though both sides had refused earlier offers for </p>

<p>assistance.</p>

<p>The error is at "for" but I don't understand why.
Should it be "had refused earlier offers of assistance"?</p>

<p>Yeah, that's right, it should be offers of assistance</p>

<p>Awesome, thanks.</p>