Which Situational Change Would Not Have Made It More Likely

Which situational change would not have made it more likely that someone would've acted to help Kitty Genovese during her attack?

A) If some of her neighbors had been police officers
B) If there had been 76 witnesses instead of 38
C) If some of her neighbors had known her before the attack occurred
D) If some of the witnesses had just heard a lecture on the situational influences on helping behavior