Answer:
I would roll with option B.
Explanation:
If I understand it correctly, I would opt for option B here's why:
Suppose the pizza or pie is $20 each.
For option A, If me and two of my friends order individually we would each only get 10% discount. So 10% of 20 is $2 so we would each pay $18 for each pizza ($54 in total for all of us).
For option B, if we order in same check that means we get 30% of our total order. Our total order is $60 (b/c each pizza is $20 so 20*3= 60). Taking 30% off of $60 is getting discount of $18 bucks which means we would pay $42 only.
Hence, comparing option A and option B, we can clearly see that opting for option B, will save 54-42 = $12.