Ions and ionic bonds — practice question

What occurs when sodium atoms react with chlorine atoms to produce sodium chloride?

• ASodium atoms each gain one electron, and chlorine atoms each lose one electron.
• BSodium atoms each lose one electron, and chlorine atoms each gain one electron.
• CSodium atoms and chlorine atoms share one electron with each other.
• DSodium atoms and chlorine atoms share two electrons with each other.