The capability blueprint is a framework that helps organizations assess their current and desired state of hardware asset management maturity.
The capability blueprint consists of five tiers, each representing a different level of capability and value.
The five tiers are:
Trustworthy data: The foundation of hardware asset management, ensuring data accuracy, completeness, and consistency.
Practical management: The basic level of hardware asset management, enabling visibility, control, and compliance of hardware assets.
Operational integration: The intermediate level of hardware asset management, enhancing efficiency, effectiveness, and collaboration of hardware asset processes.
Strategic conformance: The advanced level of hardware asset management, achieving best-in-class performance, optimization, and alignment of hardware assets with business goals.
Business transformation: The ultimate level of hardware asset management, enabling innovation, agility, and competitive advantage through hardware asset management.
The tier that focuses on achieving best-in-class is the strategic conformance tier, which aims to optimize the cost, quality, and value of hardware assets, as well as align them with the business strategy and objectives. References:
Hardware Asset Management Capability Blueprint
Hardware Asset Management Maturity Model

According to the ServiceNow Hardware Asset Management documentation, an asset is defined as "any tangible, physical company technology asset, including those currently in use, those in storage, and support equipment"1. Throughout the life of an asset, the following data are tracked2:
Financial data: This includes the cost, depreciation, and value of the asset, as well as the budget and expenses related to the asset. Financial data helps to optimize the return on investment (ROI) and total cost of ownership (TCO) of the asset.
Contractual data: This includes the terms and conditions, warranties, service level agreements (SLAs), and renewals of the contracts associated with the asset. Contractual data helps to manage the vendor relationships and compliance obligations of the asset.
Lifecycle data: This includes the status, location, ownership, and history of the asset, as well as the events and actions that occur during the asset lifecycle. Lifecycle data helps to monitor the performance and utilization of the asset and plan for its retirement or replacement.
The other options, configuration data and hardware data, are not tracked throughout the life of an asset, but rather at specific stages or levels. Configuration data is the information about the technical attributes and relationships of the asset, which is stored in the configuration management database (CMDB) and managed by the configuration management process3. Hardware data is the information about the physical characteristics and specifications of the asset, such as manufacturer, model, serial number, and barcode4. Reference:
ServiceNow Hardware Asset Management: Hardware Asset Management overview ServiceNow Hardware Asset Management: What is the IT Asset Lifecycle?
ServiceNow Hardware Asset Management: Asset and CI management
ServiceNow Hardware Asset Management: Hardware Normalization

Explanation
A stock rule is a record that defines the minimum and maximum quantity of a model or an asset in a stockroom12.
The Stock Rule Runner is a scheduled job that runs every hour and checks the stock levels of models and assets in stockrooms against the stock rules13.
If the stock level of a model or an asset is less than the minimum quantity specified in the stock rule, the Stock Rule Runner creates a stock order to replenish the stock from another stockroom or from a vendor13.
Therefore, the correct answer is A. When stock is less than the threshold specified in the stock rule.
References: 1: Use a hardware asset request flow - ServiceNow 2: Hardware Asset Inventory Management - ServiceNow 3: Stock Rules in ServiceNow - GlideFast ServiceNow

According to the Hardware Asset Management documentation, the Now Mobile app is a mobile application that enables users to access ServiceNow features and functions from their mobile devices.
The Now Mobile app allows users to view the hardware and software assets that are assigned to them, as well as request new assets or return existing assets1.
The Now Mobile app also allows users to create incidents to report issues with their devices, such as broken screens, slow performance, or malware infections1.
Therefore, the correct answer is option C, Now Mobile app, as it is the mobile app that users can leverage to view the assets assigned to them and create incidents to report issues with their devices. References:
Hardware Asset Management documentation
What is Hardware Asset Management?