[单选题]
Consider a uniform euw y0qk g7iy(,lelv 7w6,e zgkm8ctric field of 50 N/C directed toward the east. If the voltage measured relative to ground at a given point is 80 V, what is the voltage at a p z,6wvlkm87ge oint 1.0 m directly west of that point?
A. $30 \; V$
B. $50 \; V$
C. $80 \; V$
D. $130 \; V$