Refer to the exhibit.

Understanding the FortiAnalyzer Fabric:

The FortiAnalyzer Fabric provides centralized log collection, analysis, and reporting for connected FortiGate devices.

Devices in a FortiAnalyzer Fabric can be organized into different Administrative Domains (ADOMs) to separate logs and management.

Analyzing the Exhibit:

FAZ-SiteA and FAZ-SiteB are FortiAnalyzer devices in the fabric.

FortiGate-B1 and FortiGate-B2 are shown under the Site-B-Fabric , indicating they are part of the same Security Fabric.

FAZ-SiteA has multiple entries under it: SiteA and MSSP-Local , suggesting multiple ADOMs are enabled.

Evaluating the Options:

Option A: FortiGate-B1 and FortiGate-B2 are under Site-B-Fabric , indicating they are indeed part of the same Security Fabric.

Option B: The presence of FAZ-SiteA and FAZ-SiteB as FortiAnalyzers does not preclude the existence of collectors. However, there is no explicit mention of a separate collector role in the exhibit.

Option C: Not all FortiGate devices are directly registered to the supervisor. The exhibit shows hierarchical organization under different sites and ADOMs.

Option D: The multiple entries under FAZ-SiteA (SiteA and MSSP-Local) indicate that FAZ-SiteA has two ADOMs enabled.

Conclusion:

FortiGate-B1 and FortiGate-B2 are in a Security Fabric.

FAZ-SiteA has two ADOMs enabled.