HELP The center of a circle is 5 units below the origin, and the radius is 10 units. What is the equation of this circle?


A: x^2 + (y + 5)^2 = 10

B: (x + 5)^2 + y^2 = 10

C: x^2 + (y + 5)^2 = 100

D: (x + 5)^2 + y^2 = 100