Find the Center and Radius of the Circle $x ^ { 2 } + y ^ { 2 } - 16 x + 18 y = - 141$

Multiple Choice

Find the center and radius of the circle.
- $x ^ { 2 } + y ^ { 2 } - 16 x + 18 y = - 141$

A) $( - 9,8 ) , r = 2$
B) $( - 8,9 ) , r = 4$
C) $( 9 , - 8 ) , r = 4$
D) $( 8 , - 9 ) , r = 2$