You have an Azure subscription that contains 100 virtual machines. You regularly create and delete virtual machines. You need to identify unattached disks that can be deleted. What should you do? 

Answer options:

A. From Azure Cost Management, view Cost Analysis
B. From Azure Advisor, modify the Advisor configuration
C. From Microsoft Azure Storage Explorer, view the Account Management properties
D. From Azure Cost Management, view Advisor Recommendations

D

From Home "> Cost Management + Billing "> Cost Management, scroll down on the options and select View Recommendations: 

Azure Cost Management / Advisor - From here you will see the recommendations for your subscription, if you have orphaned disks, they will be listed. Reference: https://codeserendipity.com/2020/07/08/microsoft-azure-find-unattached-disks-that-can-be-deleted-and-other-recommendations/