Apply as undecided or choose a basic liberal arts, which is easiest for acceptance?

We live in Charlotte. My kid doesn't want to go far. At an A rated HS here in Charlotte. Even with a 3.5 UW is barely top half of the class. Has a job and does volunteer piano teaching. Has no idea of what to major in but is interested in Spanish, Psychology, or Music. Other options may be App State for Music Therapy. Should they declare a major or apply undecided for best shot at acceptance?