Range-Doppler ambiguity arises when limited sampling leads to uncertain association between measured range and Doppler, causing misinterpretation of target attributes.

• A. Ambiguity occurs when limited sampling leads to uncertain association between measured range and Doppler, causing misinterpretation of target attributes.
• B. Ambiguity occurs when Doppler shifts are measured perfectly but range is ignored.
• C. Ambiguity only occurs when there is no clutter.
• D. Ambiguity is a theoretical concept with no practical effect on target attributes.

Answer: (A)