Distinguish coherent vs non-coherent jamming.

• A. Coherent jamming preserves phase information to correlate with the target signal; non-coherent jamming uses noise-like interference without phase matching.
• B. Coherent jamming uses noise-like interference; non-coherent uses phase-matched signals.
• C. Coherent jamming is always easily detectable; non-coherent never affects reception.
• D. Non-coherent jamming enhances target detection.

Answer: (A)