You need to create a Dataverse business rule for a model-driven custom app. 
Please select the license that would not allow you to run the rule in a production environment.

Answer options:

A.Dynamics 365 Enterprise
B.Microsoft 365
C.Premium Power Apps
D.Premium Power Automate

Correct Answer: B 
Microsoft provides several licenses to run Power Apps and access to the Dataverse. Premium Power Apps and Power Automate licenses allow users to run custom canvas and model-driven apps. Dynamics 365 Enterprise license also has limited capabilities for running custom apps. Option B is correct because the Microsoft 365 licenses do not allow to run custom apps in a production environment.
All other options are incorrect because these licenses (Dynamics 365 Enterprise, Premium Power Apps, and Power Automate) allow to run a model-driven custom app and a business rule in a production environment. 
For more information about Power Apps licenses, please visit the below URLs: 

https://docs.microsoft.com/en-us/power-platform/admin/pricing-billing-skus
https://powervirtualagents.microsoft.com/pricing/
https://docs.microsoft.com/en-us/microsoft-365/community/powerplatformlicensingforcitizendeveloper
https://www.avantiico.com/guide-to-microsoft-power-apps-power-automate-and-power-virtual-agents-may-2020-licensing/