A physicist steps on a piece of gum. The gum exerts a constant non conservative force of 3 newtons as she picks up her foot. If her foot is 1 kg how much force would she have to exert to accelerate her foot vertically at 6 m/s2?

A) 15 newtons
B) 18 newtons
C) 28 newtons
D) 22 newtons
E) 25 newtons