Kroger is having a sale on soda. Mrs. Fitzpatrick wants to buy the cheapest soda. She knows she should look at the unit price in $ per can to find the best purchase. Which soda should she buy?
A $15 for 5 cans of Sprite
B $28 for 4 cans of Coke
C $100 for 50 cans of Pepsi
D $36 for 3 cans of Mountain Dew