When Light from a Flashlight Is Moved Quickly Back and Forth

Multiple Choice

When light from a flashlight is moved quickly back and forth on a wall in a darkened room, it can appear to observers that there is a trail of light moving across the wall, even though physically the light is only in one place at any given time. This experience is an effect of memory that occurs because of

A) a visual delay effect.
B) echoic memory.
C) persistence of vision.
D) top-down processing.