To activate HAM, navigate to System Definition > Plugins and search for Hardware Asset Management. Click Activate/Upgrade and follow the instructions1.
To run the scheduled job "Asset - Create FSM asset tasks", navigate to System Definition > Scheduled Jobs and search for the job name. Click Execute Now to run the job immediately or set a schedule for it to run periodically2.
The scheduled job will create asset tasks for existing incidents, changes, and work orders that have assets associated with them. The asset tasks will be linked to the parent records and will have the same state and assignment group as the parent records2.
The asset tasks will allow the asset managers to track and manage the assets involved in the service delivery processes3. References:
1: Hardware Asset Management - ServiceNow
2: Asset - Create FSM asset tasks scheduled job
3: Hardware Asset Management and Field Service Management integration

Explanation
The itil role enables the user to perform actions related to incident, problem, change, and configuration management. This role is part of the ITIL framework, which is a set of best practices for delivering IT services. According to the ServiceNow documentation1, the itil role can do the following:
Create and update incidents, problems, and change requests
View configuration items (CIs) and their relationships
Add comments and work notes to tasks
Approve or reject change requests
Close resolved incidents and problems
Reopen closed incidents and problems
The other roles listed in the question have different functions and permissions. For example, the procurement_user role can request and track hardware purchases2, the inventory_admin role can manage stockrooms and transfer orders3, the discovery_admin role can configure and run Discovery to populate the CMDB4, and the asset role can view and edit asset records5.
References: 1: Incident Management - Product Documentation: San Diego - ServiceNow 2: Procurement - Product Documentation: San Diego - ServiceNow 3: Inventory Management - Product Documentation: San Diego - ServiceNow 4: Discovery - ProductDocumentation: San Diego - ServiceNow 5: Asset Management - Product Documentation: San Diego - ServiceNow

To activate HAM, navigate to System Definition > Plugins and search for Hardware Asset Management. Click Activate/Upgrade and follow the instructions1.
To run the scheduled job "Asset - Create FSM asset tasks", navigate to System Definition > Scheduled Jobs and search for the job name. Click Execute Now to run the job immediately or set a schedule for it to run periodically2.
The scheduled job will create asset tasks for existing incidents, changes, and work orders that have assets associated with them. The asset tasks will be linked to the parent records and will have the same state and assignment group as the parent records2.
The asset tasks will allow the asset managers to track and manage the assets involved in the service delivery processes3. Reference:
1: Hardware Asset Management - ServiceNow
2: Asset - Create FSM asset tasks scheduled job
3: Hardware Asset Management and Field Service Management integration

The Normalization Data Services Client plugin enables you to use the Normalization Data Services (NDS) to provide consistent, good, clean data for the company names of vendors or manufacturers12.
The NDS is a cloud-based service that provides a comprehensive and up-to-date list of canonical company names for vendors and manufacturers, as well as other data such as product categories, models, and versions12.
The NDS helps you to avoid data duplication, inconsistency, and inaccuracy in your CMDB and asset management processes12.
The NDS integrates with the Hardware Model Normalization plugin, which standardizes the details of your hardware models by comparing them with the data from the Hardware Model Normalization Content Service13.
Therefore, the correct answer is D. Normalization Data Services Client (com.glide.data_services_canonicalization.client), as this is the plugin that offers consistent, good, clean data for the company names of vendors or manufacturers.