this is on usa test prep i need it done today so please help!

Answer:
A
Step-by-step explanation:
A)2 ft. x 2.5 ft. x 3 ft. = 15 ft³
B)2 ft. x 2.5 ft. x 4.5 ft. = 22.5 ft³
C)2.5 ft x 3 ft. x 4 ft. = 30 ft³
D)2.5 ft. x 2 ft. x 4 ft. = 20 ft³
Since only option A has volume less than 18 ft³, he should buy the refrigerator with dimension A- 2 ft. wide x 2.5 ft. long x 3 ft. tall