You have an Azure subscription. You have 100 Azure virtual machines. You need to quickly identify underutilized virtual machines that can have their service tier changed to a less expensive offering. Which blade should you use? 

Answer options:

A. Monitor
B. Advisor
C. Metrics
D. Customer insights

B

Advisor helps you optimize and reduce your overall Azure spend by identifying idle and underutilized resources. You can get cost recommendations from the Cost tab on the Advisor dashboard. Reference: https://docs.microsoft.com/en-us/azure/advisor/advisor-cost-recommendations