Answer: c. The agents would have been required to obtain a warrant
Explanation: The decision determined that a person’s cell phone contains more information than a person’s house does. A person therefore has a "reasonable expectation of privacy" for the contents in their phone and police should not be able to search an arrestees cell phone without voluntary consent or a valid search warrant. Police are required to have a warrant to search a person’s cell phone even after a valid arrest... So it is very feasible that the agents to search the employees phone would have been asked to get a warranty which they possibly did to have been able to assess such information.