The Reaction E⁺ + E^- →

Multiple Choice

The reaction e⁺ + e^- →

A) describes the annihilation of a positron and an electron.
B) has a large probability of occurrence only if the positron is at rest or nearly at rest.
C) requires two photons moving in opposite directions to conserve linear momentum.
D) conserves the electron lepton number.
E) All of these are correct.