Which shows one way the equation can be represented in words?

z minus 6 = 1.4
a. The difference of a number and z is the same as one and four-tenths.
b. A number subtracted from one and four-tenths is equal to six.
c. Six less than a number is the same as one and four-tenths.
d. Six decreased by a number is equal to one and four-tenths.