According to the rational roots theorem, which statement about f(x) = 25x7 – x6 – 5x4 + x – 49 is true?

a.) any rational root of f(x) is a multiple of –49 divided by a multiple of 25.
b.) any rational root of f(x) is a multiple of 25 divided by a multiple of –49.
c.) any rational root of f(x) is a factor of –49 divided by a factor of 25.
d.) any rational root of f(x) is a factor of 25 divided by a factor of –49.