What radiographic signs indicate potential voids or poor adaptation in obturation, and what steps should be taken?

• A. Radiolucent voids along the canal walls or at apex; retreat to fill canal properly or plan surgical retreat if non-surgical retreatment is not feasible.
• B. Uniform radiopacity indicates voids.
• C. Radiographs can't reveal voids.
• D. Void signs require immediate extraction.

Answer: (A)