G4B12:What effect can strong signals from nearby transmitters have on an antenna analyzer?
Direct answer summary (2023-2027 NCVEC pool)
The official correct answer for G4B12 is Received power that interferes with SWR readings.
The key fact is Received power that interferes with SWR readings. Match that fact to the exact condition in the question; the other choices describe a different rule, band, component, or operating situation.