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<p>Consider the B student in high school who goes to college with no AP credits and can only handle 12 credit semesters of college work. Also note that many students need to work part time jobs to be able to afford school, so they 15-16 credit semesters may be too hard to schedule for them.</p>
<p>The bulk of college students overall are not the A students with lots of AP credits from high income families that are overrepresented on these forums.</p>