_____________is the default standard for all security recommendations in Azure Security Center.

Answer options:

A.Azure CIS
B.Azure Security Benchmark
C.ISO 27001
D.SOC TSP

Correct Answer: B Option B is correct. When you enable Security Center, the initiative named `Azure Security Benchmark` is automatically assigned to all Security Center registered subscriptions.
Option A, C & D are incorrect. We can assign these standards as per our requirements manually.
Reference: 

https://docs.microsoft.com/en-us/azure/security-center/security-center-compliance-dashboard