Under what circumstance can police conduct searches based on a "blanket warrant"?

The correct answer highlights a fundamental principle of constitutional law regarding warrants. Blanket warrants, which authorize law enforcement to search broad areas without specific details or probable cause, are generally deemed unconstitutional. This is primarily due to the Fourth Amendment of the United States Constitution, which protects individuals from unreasonable searches and seizures. For a warrant to be valid, it must particularly describe the place to be searched and the persons or things to be seized.

In contrast, the other responses suggest scenarios that do not uphold this constitutional requirement. Stating that law enforcement can search any area without limits, or that they can conduct searches as long as the location is specified, contradicts the necessity for specificity and probable cause outlined in the Fourth Amendment. Furthermore, the assertion that a second warrant is always required for a blanket warrant is inaccurate, as the issue is not about the necessity of multiple warrants, but rather the fundamental legality of the blanket warrant itself.