Final answer:
To be reasonable, all searches and seizures must be based upon probable cause.
Step-by-step explanation:
To be reasonable, all searches and seizures must be based upon probable cause.
Probable cause is a legal standard that requires law enforcement officers to demonstrate to a judge that there is enough evidence to believe that a crime has been committed or that evidence will be found. This standard is necessary to protect individuals' rights against unreasonable searches and seizures, as guaranteed by the Fourth Amendment to the United States Constitution.
Therefore, the statement that all searches and seizures must be based upon probable cause is true.