For USC, do you need a recommendation from either a teacher or a counselor (meaning I could just ask my counselor), or do you need a recommendation from both a teacher and a counselor?
Per USC’s Common Application profile, they want a Counselor Recommendation to be submitted, and they allow up to 3 teacher recommendations, but do not require any.
That being said, some Schools within USC do require a specific # of teacher or other recommendations be submitted. SCA, for example, requires 3. That School will make such clear to you, if applicable.
Good luck…