Users at Universal Containers are complaining that a field has disappeared from the Account page...

If a field disappears from the Account page, the likely cause is that its visibility has been restricted through Field-Level Security (FLS) or a related profile/permission set update. Using Field Accessibility in Object Manager allows the admin to review and troubleshoot field permissions across profiles.

Option A: A "Who Sees What" report is used for record visibility, not field visibility.

Option B: Logging in as a user might help confirm the issue but doesn’t provide insights into why the field is missing.

Option C (Correct): Field Accessibility offers a comprehensive view of field-level security for troubleshooting.