Answer:
C
Step-by-step explanation:
A: 2 in. by 2 in. by 1 in. = 4 cubic inches
B: 1 in. by 1 in. by 1 in. = 1 cubic inches
C: 2 in. by 1.5 in. by 0.5 in. = 1.5 cubic inches
D: 3 in. by 0.5 in. by 1.5 in. = 2.25 cubic inches
Therefore, the answer is C.