In this task, you need to answer the given multiple-choice question on geometry. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.
Q: Problem: if the dimensions of a certain rectangular box are 5 inches by 2 inches by 3 inches , then the face of greatest area is of what area ?
Options: ['a ) 225 square inches', 'b ) 45 square inches', 'c ) 25 square inches', 'd ) 15 square inches', 'e ) 10 square inches']
A:
d