With Regard to Eyewitness Testimony, Research Has Shown That

With regard to eyewitness testimony, research has shown that:

A) trained police officers are more accurate than the general public in their memory of a crime
B) trained police officers are no more accurate than the general public in their memory of a crime
C) people who express high certainty that they are correct are more accurate
D) high certainty does not guarantee accuracy
E) both b and d