Conerning pair production, which of the following is true?
A.
The threshold energy for pair production is 0.51 MeV.
B.
An electron and a positron are produced.
C.
The energy of the incident photon is equal to the sum of the kinetic energies of the pair of particles.
D.
Annihilation produces 1.02 MeV photons.
E.
A pair of electrons is produced.