Sphere A is centered at the origin, and the point ((0, 0, 3)) lies on it. Sphere B is given by the equation (x² + y² + z² = 25). Which of the following is true?
a) Sphere A has a radius of 3 units.
b) Sphere B has a radius of 5 units.
c) Sphere A and Sphere B intersect.
d) Sphere B does not intersect with the z-axis.