The answer for both of them is C. Can I have an explanation please.

12. Let D() be x is a dog, and F(x) be x has fleas The statement All dogs have fleas is: (a) YTD(x) ? F(x) (b) yxD(x) F(x) (d) None of the above 13. What's the negation of No Monkey can speak French. M(r) is x is a Monkev, and F(r is x can speak French (a) 3r (M(x) V F(x)) (b) 3r (M(x-F(x)) (c) x (M(x) ? F(x)) (d) None of the above