I'm gonna do sor2, english advanced, math standard2, cafs, legal studies and business services in year 11. I also wanted to do modern history and business studies, but could only choose 12 units. So I was thinking I could drop business services in year 12 and pursue business studies. Same with modern history and legal. So my question is: Is it worth doing a subject for one whole year just to drop it? Will picking a new subject in year 12 put me at a significant disadvantage?