The Equation of the Sphere Centered at (2,1,-2) and Tangent $( x + 2 ) ^ { 2 } + ( y - 1 ) ^ { 2 } + ( z + 2 ) ^ { 2 } = 2$

Multiple Choice

The equation of the sphere centered at (2,1,-2) and tangent to the xy-plane is

A) $( x + 2 ) ^ { 2 } + ( y - 1 ) ^ { 2 } + ( z + 2 ) ^ { 2 } = 2$
B) $( x - 2 ) ^ { 2 } + ( y - 1 ) ^ { 2 } + ( z + 2 ) ^ { 2 } = 4$
C) $( x + 2 ) ^ { 2 } + ( y - 1 ) ^ { 2 } + ( z + 2 ) ^ { 2 } = 4$
D) $( x - 2 ) ^ { 2 } + ( y + 1 ) ^ { 2 } + ( z + 2 ) ^ { 2 } = 2$
E) $( x - 2 ) ^ { 2 } + ( y - 1 ) ^ { 2 } + ( z - 2 ) ^ { 2 } = 4$