A Solid Sphere of Radius 10 $\mu$ C on Its Surface $\times$

A solid sphere of radius 10.0 cm has a total charge of 10.0 $\mu$ C on its surface. The electric field 10.0 cm from the surface of the sphere is

A) 9.00 $\times$ 10⁶ N/C.
B) 2.25 $\times$ 10⁶ N/C.
C) 4.50 $\times$ 10⁶ N/C.
D) 4.50 $\times$ 10⁵ N/C.