HELP ASAP!!!! A grocery store has five different packages of bottled water. Which is the best deal available on bottled water at this grocery store?

BOTTLED WATER PRICES
6 pack for $3.00
12 pack for $4.50
24 pack for $7.00
36 pack for $12.00
48 pack for $16.00
A) 6 pack for $3.00
B) 12 pack for $4.50
C) 24 pack for $7.00
D) 36 pack for $12.00