A Photon with the Smallest Wavelength in the Continuous Z-Ray

Multiple Choice

A photon with the smallest wavelength in the continuous z-ray spectrum is emitted when:

A) an electron is knocked from a K shell
B) a valence electron is knocked from the atom
C) the incident electron becomes bound to the atom
D) the atom has the greatest recoil energy
E) the incident electron loses all its energy in a single decelerating event