Thinking back to my economics lessons, I
think it's B. Price doesn't shift the supply curve, it causes an extension/contraction. Subsidies will increase supply, causing it to shift to the right (not the left). And an increase in coffee prices will just decrease the demand of coffee so less will need to be supplied. So i think it's B.
I'm not 100% sure though (so correct me if I'm wrong, someone), I haven't done economics for a while now.
Ah that sucks.
Still, I'm sure you'll do fine eventually.