Charge of Uniform Surface Density (4

Multiple Choice

Charge of uniform surface density (4.0 nC/m²) is distributed on a spherical surface (radius = 2.0 cm) .What is the total electric flux through a concentric spherical surface with a radius of 4.0 cm?

A) 2.8 N.m²/C
B) 1.7 N. m²/C
C) 2.3 N. m²/C
D) 4.0 N . m²/C
E) 9.1 N. m²/C