In the given equations, p is a positive constant. Which statement correctly compares the graphs of circles A and B in the xy-plane?
Circle A: (x−7)2+(y−p)2=21
Circle B: (x+7)2+(y−p)2=21
Circle B is the reflection of circle A across the x-axis.
A
Circle B is the reflection of circle A across the y-axis.
B
Circle B is the translation of circle A 14 units up.
C
Circle B is the translation of circle A 14 units to the right.