The largest set on which the function $f(x,y) = 1/(5 - x^2 - y^2)$ is continuous is

A. The interior of the circle $x^2 + y^2 = 5$
B. All of the xy-plane except the circle $x^2 + y^2 = 5$
C. The interior of the circle $x^2 + y^2 = 5$, plus the circle
D. The exterior of the circle $x^2 + y^2 = 5$
E. All of the xy-plane