The circle below is centered at the point (-1, 2) and has a radius of length 3.
What is its equation?
A. (x+ 2)2+(y- 1)2 = 3^2
B. (x+ 1)2 + (y-2)2 = 9
C. (x - 2)2 + (y + 1)2 =3^2
D. (x-1)2 + (y + 2)2 = 9