Final answer:
When Rob back promotes 5 user stories across three different development environments, one to dev1, two to dev2, and two to dev3, a total of 5 separate promotion records will be created upon clicking Back Promote & Deploy.
Step-by-step explanation:
When Rob has to mass back promote 5 tested user stories from UAT, and he is distributing them across different development environments, we can determine how many promotion records will be created by analyzing the specific conditions. Each back promotion to a unique environment would require a separate record. This means there will be one promotion record for dev1, two promotion records for dev2, and two promotion records for dev3. Therefore, when clicking on Back Promote & Deploy, a total of 5 promotion records will be created. This process aims to minimize the differences between the sandboxes ensuring that each environment has the necessary user stories for further testing or development.