[单选题]
Consider a uniform electric fieljfhv)muplz;/p*wh6 r5cc p 7.d of 50 N/C directed toward the east 6vra/b/ ao-bs. If the voltage measured relative to ground at a gi-v/obs/6 bara ven point in the field is 80 V, what is the voltage at a point 1.0 m directly south of that point?