According to the Hardware Asset Management documentation, the Hardware Model Normalization Content Service is a cloud-based service that provides normalized and enriched hardware model data to the ServiceNow platform, such as manufacturer name, model name, model number, and product lifecycle information.
The Hardware Model Normalization Content Service helps customers identify and manage their hardware models more effectively, as well as plan for hardware refreshes based on end-of-life (EOL) and end-of-service (EOS) dates1.
The Hardware Model Normalization Content Service updates the content library weekly with new and updated model data1.
To determine if the content has been downloaded, you can review the Hardware Model Content Service Download section on the Model Management tab of the Hardware Asset dashboard1.
The Hardware Model Content Service Download section shows the status of the content download, such as the last download date, the number of models downloaded, and the number of models normalized1.
Therefore, the correct answer is option C, review the Hardware Model Content Service Download section on the Model Management tab of the Hardware Asset dashboard, as it is the way to determine if the content has been downloaded. Reference:
Hardware Asset Management documentation
What is Hardware Asset Management?

The capability blueprint is a framework that helps organizations assess their current and desired state of hardware asset management maturity1.
The blueprint consists of five tiers, each representing a different level of capability and value1.
The third tier is trustworthy data, which means having a single source of truth for hardware asset data that is accurate, complete, and normalized12.
Trustworthy data enables better decision making, compliance, and risk management for hardware assets12.
To achieve trustworthy data, organizations need to implement processes and tools for data discovery, reconciliation, normalization, and enrichment12. References:
The value of Hardware Asset Management - ServiceNow
Hardware Asset Management - ServiceNow