Grand Jury Selection Differs from That of Petit (Trial) Juries

Grand Jury selection differs from that of petit (trial) juries in which of the following ways?

A) membership is determined by random drawing
B) membership is recommended by a committee appointed by the district judge charged with creating the grand jury, with the judge having the authority to strike, but not add, names to the list
C) members are appointed by the District Attorney
D) members are appointed by the District Judge charged with empanelling a grand jury