You have been tasked with making sure that you are able to modify the operating system security configurations via Azure Security Center. To achieve your goal, you need to have the correct pricing tier for Azure Security Center in place. Which of the following is the pricing tier required? 

Answer options:

A. Advanced
B. Premium
C. Standard
D. Free

C

Reference: https://docs.microsoft.com/en-us/azure/security-center/security-center-pricing