Can I switch my choice of major after applying?

I applied to USC with my first choice being the Iovine and Young academy, which I was rejected from but am still being out for consideration for my second choice (CS at Vitebri). I know acceptance to that school is very competitive so I wanted to try changing it to a major which is less impacted and would give me a better chance of getting into USC since someone said transferring between schools at USC is much easier once you’re in the school. Does anyone know some of the less impacted majors at USC and if we’re able to request a change in our choice?