What needs to be deployed before configuring the identity Firewall?
A.
Network Introspection
B.
Data Security
C.
LDAP Integration
D.
Guest Introspection
Explanation:
https://pubs.vmware.com/NSX-62/index.jsp?topic=%2Fcom.vmware.nsx.admin.doc%2FGUIDF37BEF98-3661-447E-A721-C40C589E9F57.html
C I suppose: https://docs.vmware.com/en/VMware-NSX-for-vSphere/6.4/com.vmware.nsx.admin.doc/GUID-8BC71FF1-9A94-4CBD-BA95-551B0B2266FA.html
Probably D because used verb is “to deploy” and not “to configure”: https://docs.vmware.com/en/VMware-NSX-for-vSphere/6.4/com.vmware.nsx.admin.doc/GUID-F37BEF98-3661-447E-A721-C40C589E9F57.html
From your own link, Guest introspection seems to be right, but LDAP is not equal to AD.
I would say Guest Introspection