[单选题]
A 5.0-nC charge is at (0,k*k :4g/ zlyj2kna+mya y*-at 0) and a --icy:0 (de6kmcwlf 8i5mn q.w2.0-nC charge is at (3.0 m, 0). If the potential is takm-i5qldfn08iwc c6m wk(.: eyen to be zero at infinity, what is the electric potential at point (0, 4.0 m)?
A. $15 \; V$
B. $3.6 \; V$
C. $11 \; V$
D. $7.7 \; V$
