ransfer students.</p>
<div class="sourceCode" id="cb12"><pre class="downlit sourceCode r">
<code class="sourceCode R"><span><span class="co"># Possible values</span></span>
<span><span class="fu"><a href="https://rdrr.io/r/base/sort.html" class="external-link">sort</a></span><span class="op">(</span><span class="fu"><a href="https://rdrr.io/r/base/unique.html" class="external-link">unique</a></span><span class="op">(</span><span class="va">term</span><span class="op">$</span><span class="va">level</span><sp