The product has one Product Backlog, as it is a single source of requirements for any changes to be made to the product. There should be only one Product Owner, who is accountable for maximizing the value of the product and the work of the Development Team. Having multiple Product Owners or Product Backlogs would create confusion, inconsistency, and waste.

The best answer is C. Ensure every Increment meets them. Non-functional requirements (NFRs) are system qualities that guide the design of the solution and often serve as constraints across the relevant backlogs 1
. NFRs are persistent qualities and constraints typically revisited as part of the definition of done (DoD) for each Iteration, PI, or release 1 . The Scrum Team should ensure that every Increment meets the NFRs, as they are part of the product requirements and affect the value delivery and customer satisfaction.

The Development Team must do as much work as it has told the Product Owner will be done for every Product Backlog item it selects in conformance with the definition of "Done", as stated in the Scrum Guide 1 :
"The Development Team works to forecast the functionality that will be developed during the Sprint. The Product Owner discusses the objective that the Sprint should achieve and the Product Backlog items that, if completed in the Sprint, would achieve the Sprint Goal. The entire Scrum Team collaborates on understanding the work of the Sprint."

The best two answers are A and C. These two ways of creating Scrum Teams are consistent with Scrum's values because they respect the self-organization and empowerment of the people who will be working in the teams. They also foster openness and courage by allowing the people to express their preferences and opinions about the new structure.
B, D and E are not consistent with Scrum's values because they impose a top-down approach that does not involve the people who will be affected by the change. They also undermine the commitment and focus of the teams by assigning them to work on something they may not be interested in or passionate about.

The Sprint Retrospective is an opportunity for the Scrum Team to inspect itself and create a plan for improvements to be enacted during the next Sprint. The topics that are appropriate for discussion are those that relate to how the team does its work, such as processes, tools, communication, collaboration, quality, etc.
The value of work currently represented in the Product Backlog and arranging the Sprint Backlog for the next Sprint are not appropriate topics for discussion in a Sprint Retrospective, as they belong to the Sprint Review and Sprint Planning events respectively.