The correct answer is C. The Scrum Team creates the Definition of Done. According to the Scrum Guide1, "The Developers are required to conform to the Definition of Done, which is defined and evolves with the Scrum Team." The Definition of Done is a commitment by the Developers for the Increment, but it is also a shared understanding within the whole Scrum Team, including the Product Owner and the Scrum Master2. The Scrum Team collaborates to create and update the Definition of Done as needed, based on the product and organizational standards3. The Definition of Done is not imposed by any external authority or individual.

The two effective ways for the Scrum Team to make non-functional requirements visible are C and D .
C . Add them to the Definition of Done so the work is taken care of every Sprint.
The Definition of Done (DoD) is a shared understanding of what it means for a Product Backlog item to be complete and potentially releasable1. The DoD can include non-functional requirements that apply to the entire product or system, such as performance, security, usability, etc. By adding them to the DoD, the Scrum Team ensures that they are met every Sprint and that the quality of the product is maintained2.
D . Add them to the Product Backlog to ensure transparency.
The Product Backlog is an ordered list of everything that is known to be needed in the product1. The Product Backlog can include non-functional requirements that are specific to certain features or functionalities, such as response time, availability, scalability, etc. By adding them to the Product Backlog, the Scrum Team ensures that they are visible to all stakeholders and that they are prioritized and refined along with the functional requirements3.
A and B are not effective ways for the Scrum Team to make non-functional requirements visible.
A . Run the integration and regression tests before the end of the Sprint, and capture the open work for the Sprint Backlog of the next Sprint.
This approach does not make non-functional requirements visible, but rather postpones them until the end of the Sprint. This can lead to incomplete or low-quality Increments that do not meet the expectations of the customers or users. Moreover, this approach does not account for any changes or feedback that may occur during the Sprint4.
B . Put them on a separate list on the Scrum board, available for all to see.
This approach does not make non-functional requirements transparent, but rather isolates them from the functional requirements. This can lead to confusion or inconsistency in how they are handled by the Scrum Team. Moreover, this approach does not align with the principle of having a single source of truth for the product requirements, which is the Product Backlog5.

According to the Scrum Guide1, the definition of "Done" is a formal description of the state of the Increment when it meets the quality measures required for the product. The definition guides the Development Team in creating a "Done" Increment. The definition of "Done" is created by the development organization (or Development Team if none is available from the development organization). The definition of "Done" may vary significantly per Scrum Team, depending on the context. One aspect of Scrum Teams inspecting how they work toward their Product Goal is that they improve their definition of "Done" over time. Therefore, two things that are appropriate for a Scrum Master to do if the Development Team doesn't have the engineering tools and infrastructure to completely finish each selected Product Backlog item are:
Coach the Development Team to improve its skills, tools, and infrastructure over time and adjust the Definition of "Done" accordingly.
Have the Development Team establish a Definition of "Done" that is actually possible to achieve given current circumstances.

According to the Scrum Guide, management external to the Scrum Team is not involved in the Daily Scrum at all. The Daily Scrum is an internal event for the Development Team to inspect their progress toward the Sprint Goal and plan their work for the next 24 hours. The other options are not valid ways for management to be involved in the Daily Scrum, as they are either intrusive (such as giving an update or speaking on behalf of others) or unnecessary (such as being represented by the Product Owner or the Scrum Master).