You run a Solution checker for a solution. You get the error on the top of the screen that the Solution checker cannot run for your solution “because the Power Apps Checker application user does not have the required security roles.” 
What roles should you assign to the Power Apps Checker application user to resolve this error?

Answer options:

A.Environment Maker
B.Service Writer
C.Solution Checker
D.Export Customization
E.Knowledge Manager

Correct Answers: C and D 
Microsoft provides the Solution checker to identify possible errors in your apps and components and to advise you on the best practice for building model-driven apps. The Solution checker analyzes the solution`s plug-ins, custom workflows, web resources, and configurations. 
The Solution checker requires two security roles assigned to the Power Apps Checker application user: Export Customizations (Solution Checker) and Solution Checker. These roles provide the security level for communication with the Dataverse environment. 
In the Power Platform Admin Center, you need to select your environment. Then Settings/Users and open users in "Managed users in Dynamics 365". From the Enabled users` list, open the Power Apps Checker Application user (Number 1). After that, click on the Managed roles (Number 2). And on the Manage Users Roles pop-up (Number 3), select Export Customizations (Solution Checker) and Solution Checker roles. 

All other options are incorrect. 
For more information about the Solution checker, please visit the below URLs: 

https://docs.microsoft.com/en-us/powerapps/maker/data-platform/common-issues-resolutions-solution-checker#solution-checker-fails-due-to-missing-security-roles
https://docs.microsoft.com/en-us/powerapps/maker/data-platform/use-powerapps-checker