Study E3B07 - Hamboozler

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What is the typical reason for hearing an echo on the received signal of a station in Europe while directing your HF antenna toward the station?

Select	Answer
A	There are two signals being received, one from the most direct path and one from long-path propagation
B	The station's transmitter is producing spurious emissions
C	The station's transmitter has poor frequency stability
D	Auroral conditions are causing a direct and a long-path reflected signal to be received