Exam Certified Platform Developer II topic 1 question 55 discussion

A large company uses Salesforce across several departments. Each department has its own Salesforce Administrator. It was agreed that each Administrator would have their own sandbox in which to test changes.
Recently, users notice that fields that were recently added for one department suddenly disappear without warning. Also, Workflows that once sent emails and created tasks no longer do so.
Which two statements are true regarding these issues and resolution? (Choose two.)