What Might a Magistrate Ask For, If a Police Officer

What might a magistrate ask for, if a police officer is seeking a search warrant based on information provided by an informant?

A) the informant's name and address
B) other evidence corroborating the informant's information
C) nothing, since magistrates tend to take the police at their word when issuing search warrants
D) whether the officers have used the informant in the past, and whether the informant's information has been reliable
E) B and D