With Respect to Lineup Identification,in Which of the Following Situations

With respect to lineup identification,in which of the following situations do eyewitnesses tend to be less accurate?

A) when there are six foils present in the lineup
B) when the suspect is of the same race as the witness
C) when the witness is informed that the suspect may be in the lineup
D) when the suspect and the foils are viewed one at a time