Tell Which Brand or Which Size Is the Better Buy $\$ 1.20$

Multiple Choice

Tell which brand or which size is the better buy.
-Juice:
12-ounce size: $\$ 1.20$
32-ounce size: $\$ 2.99$
64-ounce size: $\$ 6.49$

A) 32-ounce size
B) all equal
C) 12-ounce size
D) 64-ounce size