Volume of an object expressed in spherical coordinates is given by (V = _0^2 _0^ frac{ }{3} _0^1 r cos ,dr ,d ,d . ) The value of the integral is _______

• A. ( frac{ 3}{2} )
• B. ( frac{1}{ 2} )
• C. ( frac{ 3}{2} )
• D. ( frac{ 3}{4} )