From University of Alabama at Huntsville:
Applicants with deficiencies in the required high school courses may be admitted in good standing under certain circumstances. The deficiencies, however, must be remedied during the first year of enrollment in a manner approved by the concerned department. Courses taken to remedy entrance deficiencies cannot be used to satisfy degree requirements.
This is probably what applies to your only 3 years of Social Studies. Many, if not most, public schooled California students only have three years of social studies. I wonder how they fare with admissions at Huntsville.