Charge of Uniform Linear Density 3 $\int _ { 0 } ^ { 3 } \frac { 27 d x } { x }$

Multiple Choice

Charge of uniform linear density 3.0 nC/m is distributed along the x axis from x = 0 to x = 3 m.Which of the following integrals is correct for the electric potential (relative to zero at infinity) at the point x = +4 m on the x axis?

A) $\int _ { 0 } ^ { 3 } \frac { 27 d x } { x }$ .

B) $\int _ { 0 } ^ { 3 } \frac { 9 d x } { 4 - x }$

C) $\int _ { 0 } ^ { 3 } \frac { 27 d x } { 4 - x }$

D) $\int _ { 0 } ^ { 3 } \frac { 27 d x } { x }$

E) $\int _ { 0 } ^ { 3 } \frac { 27 d x } { 4 + x }$ .