Why can't the network administrator find the management tool to create a DHCP scope?

The inability of the network administrator to find the management tool to create a DHCP scope is primarily due to the DHCP server role not being installed. The management tools required to create and manage DHCP scopes are part of the DHCP server role in any given server operating system. Without this role installed, there are no associated tools or interfaces available for the administrator to utilize.

The network infrastructure relies on specific roles and features being correctly added and configured to function properly. If the DHCP server role is absent, it stands to reason that the tools and console that would typically allow for scope creation and management would also not be accessible. Thus, the correct choice directly addresses the fundamental requirement of having the appropriate server role installed to perform DHCP configuration tasks, ensuring availability of the necessary management tools.