Find an Equation of the Circle with the Given Center $(9,-7)$

Multiple Choice

Find an equation of the circle with the given center and radius.
-Center $(9,-7)$ , radius $\sqrt{7}$

A) $(x+7) ^{2}+(y-9) ^{2}=49$
B) $(x+9) ^{2}+(y-7) ^{2}=7$
C) $(x-7) ^{2}+(y+9) ^{2}=49$
D) $(x-9) ^{2}+(y+7) ^{2}=7$