Heather wants to buy a new refrigerator, but she only has room for one that is 18 ft3 or less. which set of dimensions represent a refrigerator that heather can buy?
a) 2 ft. wide x 2.5 ft. long x 3 ft. tall
b) 2 ft. wide x 2.5 ft. long x 4.5 ft. tall
c) 2.5 ft wide x 3 ft. long x 4 ft. tall
d) 2.5 ft. wide x 2 ft. long x 4 ft. tall