It depends on whether or not you've started your coursework at Berkeley.
If you have not started coursework at Berkeley: You can satisfy the UC Entry-Level Writing Requirement by earning a grade of C or higher in a college course certified by UC Berkeley as satisfying the Entry-Level Writing Requirement. Make sure the college sends your transcript to the Office of Undergraduate Admissions at Berkeley.
If you have started coursework at Berkeley: You must satisfy the UC Entry-Level Writing Requirement by earning a grade of C or higher in COLWRIT R1A.