Find the Center and Radius of the Sphere $x ^ { 2 } + y ^ { 2 } + z ^ { 2 } + 18 x + 16 y - 10 z + 89 = 0$

Multiple Choice

Find the center and radius of the sphere. $x ^ { 2 } + y ^ { 2 } + z ^ { 2 } + 18 x + 16 y - 10 z + 89 = 0$

A) center: (9,8,-5) ;radius: 9.
B) center: (-9,-8,5) ;radius: 9 .
C) Center: (-9,8,-5) ;radius: 9
D) center : (9,8,-5) ;radius: 81
E) center: (9,8, -5) ;radius: 81