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<p>We don’t know. Only Harvard knows that. Reread your acceptance letter. Doesn’t it say something about them expecting you to finish high school at the same high level of performance? That’s your real answer.</p>
<p>And you are asking the wrong question. You shouldn’t be asking: how low can I go and not be rescinded? You should be asking (your teachers): What can I do to make sure my grades show no significant drop?</p>