When a Vacancy Exists in an Inner Electron Shell of an Atom

Multiple Choice

When a vacancy exists in an inner electron shell of an atom (as a result of photoelectric effect,Compton scattering,or bombardment by other electrons) ,the energy liberated when this vacancy is filled,instead of emerging from the atom as fluorescent radiation,can be transferred to another electron of the atom,thereby ejecting the electron.Such an emitted electron is called a(n) :

A) Auger electron.
B) Compton electron.
C) Edison electron.
D) Sievert electron.