Positrons (Positively Charged Electrons) Are Being Produced in the Galactic

Multiple Choice

Positrons (positively charged electrons) are being produced in the galactic center of the Milky Way. How have the positrons been detected?

A) The positrons create arches of magnetic field that are visible at radio wavelengths.
B) The positrons spiral in magnetic fields, producing a strong source of synchrotron radiation.
C) The positrons annihilate with ordinary electrons, producing gamma rays with a characteristic energy.
D) The positrons reach Earth as cosmic rays from the direction of the galactic center.