You are considering the options for the Power Platform solution to meet the customer’s goals. 
What would you start from?

Answer options:

A.Industry accelerators
B.Power Platform solutions
C.Third-party applications
D.Dynamics 365 solution
E.Customization of the Dynamics 365 solution

Correct Answer: D 
A Solution Architect always starts with the assessment of the out-of-the-box Dynamics 365 functionality for solution implementation. Then, if the requirements need additional functionality, a Solution Architect reviews the use of Power Platform products and components, including the third-party solutions. 
As a Solution Architect, you should avoid too many customizations and extensions because they can potentially increase the solution`s technical debt. Therefore, the most robust solution would be if you can implement the out-of-the-box Dynamics 365 apps functionality. The Industry accelerators can help you use the predefined Common Data Model schemas for particular industries, like banking, healthcare, education, nonprofit, etc. Such an approach can substantially cut down project time, costs and jumpstart the project implementation. 
All other options are incorrect. 
For more information about the solution options, please visit the below URL: 

https://docs.microsoft.com/en-us/learn/modules/propose-solution/1-introduction
https://docs.microsoft.com/en-us/learn/modules/fit-gap-analysis/5-apps