[单选题]
Consider a uniform elect;ep 8ws6xu 1abv 4ks5jnc uqp9);*r hjric field of 50 N/C directed toward the east. If the voltage measured relative to ground at a given po9rq n*cj)hu ;pint in the field is 80 V, what is the voltage at a point 1.0 m directly east of the point?
A. $15 \; V$
B. $30 \; V$
C. $90 \; V$
D. $130 \; V$
