E2A03 - Amateur Extra Class

E2A03 : How is an upload signal processed by an inverting linear transponder?
A The signal is detected and remodulated on the reverse sideband
B The signal is passed through a nonlinear filter
C The signal is reduced to I and Q components, and the Q component is filtered out
D The signal is mixed with a local oscillator signal and the difference product is transmitted
Correct Answer: The signal is mixed with a local oscillator signal and the difference product is transmitted