If f(x) = \frac{9}{x2-3x-10} and g(x) = \frac{2}{x2-9x+20} , what is the value of (f-g)(x) ? Additionally, are there any domain restrictions?

Options:
A. \frac{11}{(x-5)(x+2)}
B. \frac{-11}{(x-5)(x+2)}
C. \frac{11}{(x+5)(x-2)}
D. \frac{-11}{(x+5)(x-2)}