As in Alevels? Not AS? If so, I think that would get you an unconditional offer as you have 2 A Alevels and 1 B in the bank. 4 Alevels is quite unusual for an offer, normally 3. Knowing Stirling I think they'll let the C slide. I know they normally provide 2 offers on their site. Mine was either AAB (straight into second year) or BBC (which they gave me). You should check. Hope this helped.