X-Rays Are Generated When

X-rays are generated when:

A) metals such as W,Mo,Ag,or Rh are heated to high temperatures.
B) high energy photons strike a metal such as W,Mo,Ag,or Rh.
C) high-energy electrons strike an anode made of metals such as W,Mo,Ag,or Rh.
D) high-energy protons strike an anode made of metals such as W,Mo,Ag,or Rh.
E) metals such as W,Mo,Ag,or Rh are electrically excited.