Option A: Incorrect. I-Q modulation doesn't eliminate the need for high-resolution ADCs - ADCs are still needed for digital conversion. ADC requirement isn't eliminated. Option C: Incorrect. I-Q modulation doesn't reduce minimum detectable signal level - sensitivity depends on noise figure and other factors, not I-Q modulation. MDS reduction isn't the advantage. Option D: Incorrect. I-Q modulation doesn't provide automatic D/A conversion - D/A conversion is a separate function. Automatic conversion isn't the advantage.