【单选题】In each of the 13 trials, how did the magnitude of the electrical force exerted by Sphere X on Sphere Y compare to the magnitude of the electrical force exerted by Sphere Y on Sphere X ?
A.
The magnitude of the electrical force exerted by Sphere X on Sphere Y was greater than the magnitude of the electrical force exerted by Sphere Y on Sphere X.
B.
The magnitude of the electrical force exerted by Sphere X on Sphere Y was less than the magnitude of the electrical force exerted by Sphere Y on Sphere X.
C.
The magnitude of the electrical force exerted by Sphere X on Sphere Y was the same as the magnitude of the electrical force exerted by Sphere Y on Sphere X.