The correct response is:
It will spread uniformly over the surface of the sphere, because of the conducting nature of the sphere and similar charges push away from each other.
This explanation is accurate because metals are good conductors of electricity, allowing free movement of electrons. When the negatively charged rubber rod is brought into contact with the metal sphere, electrons from the rod will transfer to the sphere. Due to the nature of like charges repelling each other, the negative charges will distribute themselves evenly across the surface of the sphere, resulting in a uniform negative charge.