I want the answer please plus the explanation

20. A factory has n employees, w of whom are women. If 10 percent of the men employed are 60 years of age or older, how many men under 60 years of age are employed in this factory? (A) 0.9(w - n) (B) 0.9(n - w) (C) .0.9n - w (D) 0.9(n - w) W