Wrong Answer .... Correct Answer should be A and C ....

You can Create a Device Group Hierarchy to nest device groups in a tree hierarchy of up to four levels, with
lower‐level groups inheriting the settings (policy rules and objects) of higher‐level groups. At the bottom
level, a device group can have parent, grandparent, and great‐grandparent device groups (ancestors). At the
top level, a device group can have child, grandchild, and great‐grandchild device groups (descendants). All
device groups inheriting settings from the Shared location—a container at the top of the hierarchy for
configurations that are common to all device groups.
Creating a device group hierarchy enables you to organize firewalls based on common policy requirements
without redundant configuration. For example, you could configure shared settings that are global to all
firewalls, configure device groups with function‐specific settings at the first level, and configure device
groups with location‐specific settings at lower levels. Without a hierarchy, you would have to configure both
function‐ and location‐specific settings for every device group in a single level under Shared.