Kayla says that the point labeled C in the diagram below is the center.
Raymond says that point C is the radius.

Who is correct and why?

A.Kayla is correct; the center is a fixed point in the middle of the sphere.

B.Kayla is correct; the center is a line segment from the center to the surface of the sphere.

C.Raymond is correct; the radius is the fixed point in the middle of the sphere.

D.Raymond is correct; the radius is a chord that is from the center to the surface of the sphere.

HURRY I WILL GIVE U THE BRAINLYEST BECAUSE I AM IN A TIMER PLZ!!!!!!!!!!!!!!!!!!!!