Which Windows PowerShell cmdlet should you use?

Your company has a hybrid deployment of Office 365. You need to verify whether free/busy information
sharing with external users is configured.
Which Windows PowerShell cmdlet should you use?

A.
Test-OutlookConnectivity

B.
Test-FederationTrust

C.
Get-OrganizationRelationship

D.
Get-MSOLDomainFederationSettings