According to the Hardware Asset Management documentation, the hardware model normalization process is a process of comparing the model data in the ServiceNow platform with the data from the Content Library, which is a cloud-based service that provides normalized and enriched hardware model data.
The Content Library automatically populates your inventory with non-discoverable asset metadata, which are the data that cannot be obtained from discovery tools or manual entry, such as manufacturer name, model name, model number, and product lifecycle information1.
The product lifecycle information includes the manufacturer lifecycle dates, which are the dates when the manufacturer stops selling, supporting, or servicing a hardware product1.
The manufacturer lifecycle dates are important for hardware asset management, as they help customers plan for hardware refreshes based on end-of-life (EOL) and end-of-service (EOS) dates2.
Therefore, the correct answer is option C, manufacturer lifecycle dates, as they are the non-discoverable asset metadata that the Content Library automatically populates your inventory with as part of the hardware model normalization process. Reference:
Hardware Asset Management documentation
What is Hardware Asset Management?

Normalization is the process of aligning hardware asset data with the ServiceNow Content Library, which provides standardized values for manufacturer, product name, and model number. During normalization, the system compares the hardware model data with the content library and assigns a status to indicate the level of match. The status of Match Not Found means that the system could not find any matching record in the content library for the hardware model. The most common cause for this status is missing data, such as an empty manufacturer field or a generic product name. To resolve this issue, the user can manually edit the hardware model record and provide the missing data, or use the lookup feature to search for a matching record in the content library. Alternatively, the user can create a new content library record for the hardware model and link it to the asset record. References:
* Hardware model normalization
* Normalize hardware models
* Create a content library record

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?