Identify the statement below that was derived from the results of the Milikan experiment using charged oil drops.

• A. The magnitude of the charge on an electron was determined
• B. The neutron and proton having similar mass was confirmed
• C. It was observed that cathode rays were identical to a stream of electrons coming from an atom.
• D. The experiment proved that the nucleus contains the most of the mass of the atom

Answer: (A)