Which of the Following Is True Concerning Video Surveillance

Which of the following is true concerning video surveillance?

A) It is legal because individuals have no reasonable expectation of privacy in public places.
B) Police may only turn on video camera if they have a reasonable expectation that a crime will occur.
C) Police must get a warrant in all cases to obtain privately-owned surveillance tape from ATMs or private security systems.
D) Video surveillance evidence may only be presented in court if every person in the video gives consent.
E) Video surveillance does nothing to deter crime.