Which statement could explain why the RPO value cannot …

A vSphere Administrator is in the process of configuring replication for a virtual machine, but is not able to
select the Recovery Point Objective (RPO) value of 5 minutes.

Which statement could explain why the RPO value cannot be lower than 15 minutes?

A.
The OS quiescing option is selected for Replication options.

B.
The virtual machine hardware version is not compatible.

C.
The target and source sites use different types of datastores.

D.
The target and source sites are not using VMFS 6.0 datastore.

Explanation:
http://pubs.vmware.com/vsphere-replication-61/index.jsp?topic=%
2Fcom.vmware.vsphere.replication-admin.doc%2FGUID-9E17D567-A947-49CD-8A84-8EA2D676B55A.html