I would be in category A.
When I was applying to nursing school
, I contacted my nursing school first with the intentions of attending and was directed on what to do next. The nursing school itself gave me all the information I needed to complete all the pre-courses and everything else which involves. With admission work completed, I was accepted into the nursing program as a first year nursing student. As a first year nursing student, I began and finished my pre-nursing courses. With pre-nursing finished, I am now about to start my second year (junior year) of nursing school this Fall 2012. So technically, I was a pre-nursing major in my first year even though I was an accepted nursing student.
I don't feel like I've missed out on other experiences because of nursing school. Nursing school is what I've always wanted to do. So, I went for it. I knew right from the beginning that nursing was, it. After a year in passing, I still feel nursing is the best suited field for myself. I cannot think of any other field where I'd be most happy or satisfied working in. I do have other interests besides nursing, but those interests would never trump nursing. If I had to do it all over again, I'd still pick nursing.