<p>Different sources say different things:</p>
<ol>
<li>The plurality of such collective nouns as "group", "jury", "family", "committee" varies, depending on whether the objects contained in the noun are acting individually or as a group.</li>
<li>On the SAT, the plurality of collective nouns is ALWAYS SINGULAR in the case of "group", "jury", etc. and ALWAYS PLURAL in the case of "groups", "juries", etc. regardless of whatever else it is describing.</li>
</ol>
<p>I am aware that English grammar does allow for the plurality of collective nouns in cases such as described in (1) above, but what I'm asking is: What does the SAT test? I've heard both in more than 1 place.</p>
<p>Side question, might as well ask it while I'm here:
Is "frustrated at" grammatically correct? Or should it be "frustrated by"/"frustrated with"? (Blackstone Review SAT Writing WB makes this distinction)</p>