Which information can the administrator use to identify iSCSI nodes?

B is correct

iSCSI names are formatted in two different ways. The most common is the IQN format and the other is Enterprise Unique Identifier (EUI) Format

http://pubs.vmware.com/vsphere-4-esx-vcenter/index.jsp?topic=/com.vmware.vsphere.config_iscsi.doc_41/esx_san_config/storage_area_network/c_iscsi_naming_conventions.html

IQN