An Eyewitness from a Crime Is Asked to Look Through

An eyewitness from a crime is asked to look through some mugshots to see if he can identify the person who committed the crime. After doing this, he sees a police lineup of suspects and identifies one of the men as the person who committed the crime because
He looks very familiar. Unfortunately, the man in the lineup looks familiar not because the eyewitness saw him commit the crime, but because he saw his face in the mugshot books a few hours ago and the eyewitness has forgotten this. This example best
Demonstrates the phenomenon of:

A) source confusion.
B) proactive interference.
C) retrograde amnesia.
D) memory consolidation.