The Reaction E⁺ + E^- $\to$ $\gamma$ $\gamma$ A)describes the Annihilation of a Positron

Multiple Choice

The reaction e⁺ + e^- $\to$ $\gamma$ + $\gamma$

A) describes the annihilation of a positron.
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) is an electron-positron reaction.
E) All of these are correct.