That the Radio Lobes Radiate Synchrotron Radiation Indicates That

Multiple Choice

That the radio lobes radiate synchrotron radiation indicates that

A) high-speed electrons are spiraling through a magnetic field.
B) the source of the radio jets must be a black hole.
C) the source of the radio energy is rotating rapidly.
D) the central galaxy must be a giant elliptical galaxy.
E) the central galaxy must rotate about two nearly perpendicular axes.