What is the equation of the circle with center (-3.2, 2.1) and radius 4.3?
A. (x-2.1)^2 - (y + 3.2)^2 = (4.3)^2
B. (x + 3.2)^2 + (y - 2.1)^2 = 4.3^2
C. (x+ 2.1)^2 + (y- 3.2)^2 = 4.3^2
D. (x- 3.2)^2 + (y + 2.1)^2 = (4.3)^2