Depends on the type of school I think. Will the student go after elite / selective schools or otherwise ?. Often time kids get too advanced, take credit in college, and struggle.
I could make a case for neither - the rigor is there regardless.
Stats if a social science were a major option.
But I lean toward BC because I wouldn’t want to be in a position, back in calc after a year off.
A lot will depend on the level of school she’s interested in and whether or not the student can handle the rigor on top of college apps and well, just being a kid.
Good luck