DS got a B in MVC this term and has gotten straight As in all of historical math classes including BC. He attends a very rigorous BS. He was recruited to Swarthmore and was told to not put math as an area of academic interest on his ED app., which it isn’t. A B in LA will likely hurt your chances at top schools if you intend to pursue math. Not to be a downer but I would diversify your list. Good luck.
To add: another option is to not add the LA grade on subsequent applications.