General exam question G7C10

WhyAn advantage of using I-Q modulation with software-defined radios is that all types of modulation can be created with appropriate processing. Because I-Q modulation carries both amplitude and phase information independently, appropriate digital signal processing applied to the I and Q streams can synthesize essentially any modulation type from that same underlying hardware, which is exactly the flexibility SDR designs exploit, answer B. I-Q processing doesn't eliminate the need for high-resolution converters (SDR performance still depends heavily on ADC/DAC quality), doesn't by itself reduce minimum detectable signal level, and analog-to-digital conversion is a separate hardware step, not something I-Q modulation automatically performs, so A, C, and D are wrong.