Spheres of Charge: a Solid Nonconducting Sphere of Radius R

Multiple Choice

Spheres of charge: A solid nonconducting sphere of radius R carries a uniform charge density throughout its volume. At a radial distance r₁ = R/4 from the center, the electric field has a magnitude E₀. What is the magnitude of the electric field at a radial distance r₂ = 2R?

A) E₀/4
B) zero
C) E₀/2
D) E₀
E) 2E₀