<p>
</p>
<p>However, if STEM subjects are possibilities, then he must plan his discovery at a four year college to ensure that he will make progress in those possible majors to avoid delayed graduation if he decides on such a major, due to sometimes-long sequences of prerequisites. This is less of an issue if he starts at community college, since extra semesters of community college are less expensive, and there is not the institutional requirement to decide on a major after four semesters.</p>
<p>It is less of an issue if the only possible majors are those with short or nonexistent prerequisite sequences (some humanities and social studies subjects, for example).</p>