The electric field in a region is radially outward with magnitude `E=Agamma_(0)`. The charge contained in a sphere of radius `gamma_(0)` centered at the origin is
A. `1/(4piepsilon_(0)) Agamma_(0)^(3)`
B. `4 piepsilon_(0)Agamma_(0)^(3)`
C. `(4piepsilon_(0)A)/gamma_(0)`
D. `1/(4piepsilon_(0))A/(gamma_(0)^(3)`