A. In advanced mode, FortiGate can be configured as an LDAP client and group filters can be configured on FortiGate.
This is true because advanced mode allows FortiGate to query the LDAP server directly for user information and group membership, without relying on the collector agent. This enables FortiGate to apply security policies based on LDAP group filters, which can be configured on FortiGate1
D. Advanced mode supports nested or inherited groups.
This is true because advanced mode can handle complex group structures, such as nested groups or inherited groups, where a user belongs to a group that is a member of another group. This allows FortiGate to apply security policies based on the effective group membership of a user, not just the direct group membership1
FortiGate Infrastructure 7.2 Study Guide (p.146): "Also, advanced mode supports nested or inherited groups; that is, users can be members of subgroups that belong to monitored parent groups." "In advanced mode, you can configure FortiGate as an LDAP client and configure the group filters on FortiGate. You can also configure group filters on the collector agent."
