Brian, a Police Officer, Acquired a Search Warrant for a Man

Brian, a police officer, acquired a search warrant for a man named Jacob and later found drugs on him. However, it was later known that the warrant was for another man with the same name. A computer error had caused the mix up and Brian had been unaware of it. According to the good faith exception, which of the following is likely to have happened?

A) Jacob was used as an informant in an ongoing drug trafficking investigation.
B) Brian was given administrative leave pending investigation.
C) Jacob was released because the warrant was not issued in his name.
D) The evidence was admissible as Brian was unaware of the error.