Which is more marketable- music ed or music therapy?

My son is torn between 2 choices- music education and music therapy. He would be happy with either one-no strong preference either way for him. Given that he is not expecting to easily find a position in either field, which one has a better chance of landing a permanent position in?

Doing both, which is offered at some schools, would entail a fifth year of college which we can’t really afford so it’s an either/or situation.