Hi. I am going to start my 2nd year of undergraduate Physics this month. Here at my Uni you can apply, for no extra charge, to one extra class per semester, in any field of study. I regret I didn't do it last year, cause I was lazy, but now I really want to. Thing is, I have no idea what to pick. I was considering something in maths or computation, but I'm also taking a minor in maths, which will include most of the maths subjects I was interested on, like Complex Analysis and Topology. I also considered something on another field entirely, like Philosophy or something. I am a bit lost here, I could use some advice.