An Infinitely Long Cylinder of Radius 4 $\rho$ = 200 NC/m³

Multiple Choice

An infinitely long cylinder of radius 4.0 cm carries a uniform volume charge density $\rho$ = 200 nC/m³.What is the electric field at r = 8.0 cm?

A) 0.23 kN/C
B) 0.11 kN/C
C) 57 N/C
D) 0.44 kN/C
E) zero