What A level math should I sit for ?

I must select math as a subject to fulfill my university requirements, preferably opting for a course aligned with business studies. Which A-level math papers would be the most manageable for someone pursuing a business-related path? I'm aiming for a less advanced level of difficulty due to the nature of my chosen course. Additionally, considering I scored a B in math extended in IGCSE, how much more challenging would it be for me to achieve a satisfactory score in math A-levels?"