Answer:
The correct option is (c).
Step-by-step explanation:
In the conduction process, the electrons get transferred from one object to the other object. The electrons are freely charged particles. Protons cannot be moved freely.
In the given problem, the given aluminum pie plate is negatively-charged initially. After the conduction process, the plate gets electrically neutral.
It means that the excess of electrons from the aluminum pie plate is removed. Then, the number of electrons and the number of protons becomes equal. The plate becomes electrically neutral.
Therefore, the correct option is "Electrons were removed from the object".