Discussion
Collector modulation applies the message to
Answer: B
In high-level, or collector, modulation the message varies the supply to the output stage, so the carrier amplitude follows it and the whole transmitter runs at high efficiency in class C. It is the classic broadcast arrangement. Modulating at the first stage is low-level modulation, which then requires a linear and less efficient chain afterwards. The matching network and the oscillator are not modulation points at all.
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