An outline pet store offers the hamster house. 6ft by 4ft by 3ft by 1ft by 2ft. Choose all of the expressions that could be used to find the volume of the hamster house.
a. (1 x 3 x 4) + (2x5x3)
b. (1x3) + (4x2) + (5x3)
c. (1x3x2) + (6x3x2)
d. 3x (1+4) + 2 x(5+3)
e. (3x4) + 1 x (2x5) +3