How do I inform CSULB of a change in courseload?

<p>I dropped out of AP Environmental Science after the 1st semester of my senior year(I received a C in the class and I've already completed the A-G requirements for the sciences). Should I call the admissions office, or do I have to mail CSULB a letter stating my courseload change? The admissions office apparently doesn't have an email address, so I can't just straight up email them the information. Thank you, CCers!</p>