It is most likely A.
Criminal cases (such as murders, felonies, etc.) have to have evidence from the state (camera recordings (probably from a store or a street camera), autopsies (probably), etc.).
Think of Law and Order cases.
Civil cases (ex. a person suing another person) have to have evidence from their own possession (ex. if a person is suing another for ruining their fence, they must bring evidence that the sued person actually did it, such as a camera recording they took from their phone). Think of Judge Judy cases.
Although I'm not 100% sure, it is very likely that the answer is A.
B. Is manipulated by the researcher
Answer:
is this a book ? please give more information! thank you
Answer:
sometimes yes sometimes no
