Final answer:
Probable cause requires the police to have reasonable grounds to believe a crime has been committed and prevents them from searching without any reason or evidence. It protects individuals from unreasonable searches and seizures.
Step-by-step explanation:
The significance of "probable cause" when conducting a search is that it requires the police to have reasonable grounds to believe a crime has been committed. This means that the police cannot simply search without any reason or evidence (Option A). It is a constitutional requirement to protect individuals from unreasonable searches and seizures. Probable cause ensures that the police do not have complete control over search locations (Option C), but rather they must have a valid and specific reason to believe that evidence of a crime will be found in a particular place.
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