According to the Hardware Asset Management documentation, the Hardware Asset Management (HAM) plugin is a licensable application that provides advanced workflow, automation, and mobile capabilities to maintain your assets.
To activate the HAM plugin, you need to request it from the HI Customer Service System1.
Once the HAM plugin is activated, you can access the Hardware Asset Management application from the application navigator in the ServiceNow platform2.
The Hardware Asset Management application contains several modules, such as Hardware Assets, Hardware Asset Dashboard, Hardware Normalization, and Asset Lifecycle Automation2.
Therefore, the correct answer is option D, check for the Hardware Asset Management application in the application navigator, as it indicates that the HAM plugin is installed on your instance. Reference:
Hardware Asset Management documentation
Hardware Asset Management - Product Documentation: Tokyo - ServiceNow