The electric potential (V(x, y)) at a point in the xy plane is given by (V(x, y) = y - 3xy² + 4yx²), where (x) and (y) are in meters. What is the x-component of the electric field at (x = 3)?
a) 12 V/m
b) -24 V/m
c) 24 V/m
d) -12 V/m