The Scrum Master should ask the person to share the issue with the team as soon as possible, as stated in [5]: "The Scrum Master should encourage transparency and collaboration within the team and with other stakeholders. If there is a concern about data security issues, it should be brought up to the team and discussed openly. The team can then decide how to handle it, whether by creating a Product Backlog item, updating the definition of "Done", or taking some other action."

A Developer becomes accountable for an item in the Sprint Backlog never as Developers on the Scrum Team share accountability for items in the Sprint Backlog, as stated in the Scrum Guide: "The Developers can select whatever items they want as long as they feel they can complete the work by the end of the Sprint. The Scrum Team is responsible for all estimates. The Product Owner may influence the Developers by helping them understand and select trade-offs, but the people who will perform the work make the final estimate."

The best two answers are B and D. These two ways of dealing with regulatory compliance issues are consistent with Scrum's values and principles, as they allow the Scrum Team to deliver valuable and potentially releasable increments of the product while meeting the necessary standards and regulations. They also enable the Scrum Team to inspect and adapt their compliance strategy based on feedback and changing requirements.
A is not a good answer because it creates a separate silo of responsibility for compliance issues, which can lead to delays, conflicts, and inefficiencies. It also violates the Scrum value of transparency, as the compliance team may not have full visibility into the product development process.
C is not a good answer because it implies a waterfall approach that assumes all the compliance requirements are known and fixed upfront, which is rarely the case. It also reduces the flexibility and responsiveness of the Scrum Team, as they may have to follow a rigid plan that does not reflect the current reality of the product or the market.