Discussion
Why are RC oscillators preferred to LC types at audio frequencies?
Answer: B
At a few hundred hertz an LC tank would need an inductance of henries with a capacitance of microfarads, physically large, expensive and lossy, while resistors and capacitors of the required values are trivial. The quality factor of an RC network is actually poor, stabilisation is needed either way, and LC oscillators work at low frequencies in principle. What is practical to manufacture at a given frequency decides the topology far more often than any theoretical consideration.
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