What is the primary purpose of the Double Jeopardy principle?

The primary purpose of the Double Jeopardy principle is to prevent multiple prosecutions for the same offense. This legal doctrine is grounded in the principle of legal certainty and fairness, ensuring that an individual cannot be tried again for a crime for which they have already been acquitted or convicted. It aims to protect individuals from the stress and stigma associated with being subjected to repeated trials for the same incident, thereby upholding the integrity of the judicial system. This principle fosters public confidence that once a verdict is rendered, the matter is considered conclusively settled, which is vital for the rule of law and justice in society.

In the context of the other options, while protecting the rights of victims, allowing for appeals, and ensuring speedy trials are significant aspects of the justice system, they do not directly relate to the specific function of the Double Jeopardy principle. Therefore, the correct response captures the essence of the principle's role within legal frameworks effectively.