Universal Container Salesforce Manager asked his salesforce admin to check why one of the workflows doesn’t seem to trigger even though records meet the criteria. Which tool will help salesforce admin troubleshoot this issue?

Answer options:

A.Setup
B.Setup Audit Trail
C.Flow
D.Debug Log

Correct Answer: D 
Option A is incorrect because through setup you have different functions to choose from and its not specific to troubleshooting one area. It contains all administrator, build and customization setup, etc. 
Option B is incorrect because Setup Audit Trail tracks the recent setup changes that you and other admins have made to your org 
Option C is incorrect because a flow is an application inside salesforce that automates a business process by collecting data and performing operations in your org or an external system 

https://help.salesforce.com/articleView?id=000337022&language=en_US&type=1