Yes, choosing courses is almost never a big problem, as long as you have spare time to choose. The key is that the courses you choose should meet the requirements of the training program, otherwise you will be in trouble in the graduation exam in the future. In the past many years, the policy has been that the selection of difficult courses conforms to the training plan, and vice versa.

I don't know what you think, because you want to change your major in the future, or because it's harder to get a high B than a high C and you want to challenge yourself. In fact, the difficulty of high number C in recent years is not low, and the emphasis on knowledge points in the two courses is different. If you don't have the idea of switching to management, I still suggest you take the advanced C.