How should backfilling be monitored to prevent damage to coating on a pipeline?

How should backfilling be monitored to prevent damage to coating on a pipeline?

• A. Ignore coating and complete backfill quickly.
• B. Only inspect coating after several days.
• C. Carefully monitor lift height, avoid heavy impacts on coating, and inspect coating after backfill; report damage.
• D. Use heavy tamping to settle backfill.

Answer: (C)