53. A non-conducting sphere of radius 10 cm is uniformly charged with a density of 100 nC/m3 . What is the magnitude of the electric field at 4.0 cm from the center ofthe sphere? (ε0 = 8.85 x 10-12 C2/N·m2)
(A)50 N/C
(B)100 N/C
(C)150 N/C
(D)300 N/C
(E)600 N/C