Digital signal processing (DSP) of RADAR signals (compared with analog) causes:

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Digital signal processing enhances radar performance by making weak signals more detectable and targets more distinct. By sampling the received waveform and applying digital techniques, the system can perform pulse compression, which concentrates energy into a shorter, sharper pulse and increases peak signal-to-noise ratio. It also allows coherent integration of many pulses, so the signal adds constructively while random noise averages out, improving the ability to see faint targets. Additionally, digital filters and adaptive processing help suppress clutter and noise, further boosting weak-signal detection and target visibility.

Display quality improvements and interference considerations aren’t the primary effects of radar DSP. DSP can aid in processing the data that feeds displays, but the main gain here is enhanced weak-signal detection and target enhancement, which is why that option is the best choice.