Which of the following is NOT considered a legal entry?

The correct answer is D, which refers to a random search without cause not being considered a legal entry. Legal entries into a person's property or personal space must be conducted in accordance with established legal standards to protect individuals' rights against unreasonable searches and seizures.

A warrant, exigent circumstances, and consent from the individual involved all represent situations where legal authority has been appropriately established for entry. A warrant is a document issued by a judge that allows law enforcement to conduct a search based on probable cause. Exigent circumstances allow for immediate action when delay would result in the loss of evidence or pose a danger to life or property, justifying entry without a warrant. Police consent involves an individual giving permission for law enforcement to enter and search a premises willingly.

In contrast, a random search without any cause lacks the legal justification needed under the Fourth Amendment, making it illegal. Such searches infringe on personal rights as they do not rely on a valid reason or legal framework. Therefore, random searches without cause are not recognized as a legal entry due to the lack of necessary preconditions that uphold constitutional protections.