Put the following rational numbers in order from greatest to least.

a. -0.4, -1/4, 4.0 x 10^-3, 40%
b. -1/4, -0.4, 40%, 4.0 x 10^-3
c. 40%, 4.0 x 10^-3, -1/4, -0.4
d. 4.0 x 10^-3, 40%, -0.4, -1/4