The Standard tier extends the capabilities of the Free tier to workloads running in private and other public clouds, providing unified security management and threat protection across your hybrid cloud workloads. The Standard tier also adds advanced threat detection capabilities, which uses built-in behavioral analytics and machine learning to identify attacks and zero-day exploits, access and application controls to reduce exposure to network attacks and malware, and more.
Scenario: Security Operations Requirements
Litware must be able to customize the operating system security configurations in Azure Security Center.
References:
https://docs.microsoft.com/en-us/azure/security-center/security-center-pricing

Explanation:

Reference:
https://docs.microsoft.com/en-us/graph/permissions-reference#calendars-permissions

D: You need write permission in the workspace that you select to store your custom alert.
References:
https://docs.microsoft.com/en-us/azure/security-center/security-center-custom-alert