Answer: D!!!!
Explanation:
You would find for each size the cost per fluid ounce
1.19/12=0.09917 per fluid oz
1.54/16=0.09625 per fluid oz
2.19/32=0.06844 per fluid oz
4.98/80=0.6225 per fluid oz
The last one, 80 fl oz, costs the least in unit prices