When should you use the terraform force-unlock command?

Detailed Explanation:

Rationale for Correct Answer: terraform force-unlock should be used only when Terraform’s normal automatic unlocking has failed and you are sure no other Terraform process is actively using the state. It manually removes a stale lock.

Analysis of Incorrect Options (Distractors):

A. When terraform apply has failed due to a state lock. Incorrect. A lock error alone does not justify force unlocking. Another valid Terraform operation may still be running.

B. When you have a high-priority change. Incorrect. Urgency is not a valid reason to bypass state locking safeguards.

D. When you see a status message stating that Terraform cannot acquire the lock. Incorrect. This may simply mean another run is active. You should investigate before using force-unlock.

Key Concept: Force unlocking is a recovery action for stale locks, not a normal operational shortcut.