What does the exclusionary rule aim to achieve?

The exclusionary rule is a legal principle that aims to keep illegally obtained evidence out of court. This rule is grounded in the Fourth Amendment, which protects individuals from unreasonable searches and seizures. If law enforcement officers obtain evidence through a violation of a person's constitutional rights—such as without a valid search warrant or probable cause—that evidence cannot be used against the individual in a court of law. This serves to deter law enforcement from engaging in unlawful practices, thereby upholding the integrity of the judicial process and ensuring that individuals' rights are protected within the legal system.

The other options presented do not accurately reflect the primary purpose of the exclusionary rule. While encouraging cooperation with law enforcement and expediting legal proceedings are important aspects of the criminal justice system, they are not the focus of the exclusionary rule. Similarly, the rule does not aim to ensure that all evidence is admissible in court; rather, it sets specific standards that must be met for evidence to be deemed admissible.