Surely it isn't just about work though?
Appreciate there are long term goals, but to get onto an Apprenticeship or enrol onto a college or 6th form subject, it is about the basics? English, Maths, Science and ICT.
Anything else at GCSE stage, isn't going to make a massive difference to your career prospects. However, if you are good at it and can gain an A-C in Art, over a D-G in Business Studies, maybe it would be the better decision.
Once the GCSE's are completed, THEN you can narrow the field down and specialise in a subject, relevant to your planned career.
Granted someone wanting to progress onto a Business course at Level 3 (A-Level), would have a potential head start, but the syllabus isn't too different at the end of GCSE's, compared to the start of an A-Level.
RE: What's annoying you today? V3
'Illegitimis non carborundum'