Class scheduling dilemma

Hi. Recently, my counselor informed me that, due to schedule conflict, I would have to either drop Calc BC or Japanese 3 Honors. My counselor asked if I would consider taking another math class (I’m not sure which class, most likely AP stats, which is less than ideal) and take BC during my senior year (since I’m a junior). I am at odds here. I’d like to take 4 years of language, but I don’t think I can drop Calc Bc. The only online options for BC aren’t affordable and I don’t know what to do. Does not having four years of foreign language look bad? Sorry, I’m at odds here.

Why can’t you just take BC senior year?