In a Certain Region, the Electric Potential Due to a Charge

Multiple Choice

In a certain region, the electric potential due to a charge distribution is given by the equation V(x,y) = 2xy - x² - y, where x and y are measured in meters and V is in volts. At which point is the electric field equal to zero?

A) x = 0.5 m, y = 1 m
B) x = 1 m, y = 1 m
C) x = 1 m, y = 0.5 m
D) x = 0.5 m, y = 0.5 m
E) x = 0 m, y = 0 m