A Small Styrofoam Ball of Mass 0 $\vec { E }$

A small styrofoam ball of mass 0.120 g is placed at rest in an $\vec { E }$ field of 6000 N/C pointing downward.What excess charge must be placed on the ball for it to remain suspended in the field?

A) -16.0 nC
B) -18.0 nC
C) -57.2 nC
D) -125 nC
E) -196 nC