Explanation: A tuned RF amplifier stage prior to the mixer in a superheterodyne receiver offers several crucial advantages. It **improves receiver sensitivity** by providing gain for weak signals early in the receiver chain, elevating them above the noise floor of subsequent stages. Simultaneously, the tuned circuit in this stage **improves image rejection** by attenuating the image frequency before it can reach the mixer. This stage also **improves selectivity** by acting as a preselector, filtering out strong adjacent or out-of-band signals that could overload the mixer or create spurious responses. Furthermore, it **improves stability** by isolating the mixer from the antenna, preventing antenna impedance changes from affecting mixer performance and reducing local oscillator radiation. Finally, by amplifying the desired signal with a low noise figure, it **improves the overall signal-to-noise ratio (SNR)**. The preselection capability directly leads to **reduced interference** from unwanted signals. Since all these benefits are provided, "All of the above" is the correct answer.