Participants Are Shown Pictures of Two Alternating Scenes That Are

Participants are shown pictures of two alternating scenes that are separated by a brief blank interval. The scenes are identical except for one small changed part. In this case participants find it hard to detect the change. Which of the following statements is MOST likely to be true?

A) This effect occurs only when participants are unaware that there is a change in the scene.
B) A similar effect can also be found with movies and in real live events (where participants fail to detect changes that have been made) .
C) A similar effect can also be found with movies (where participants fail to detect changes that have been made) but not with real live events.
D) Changes in the center of a scene often take longer to detect than changes in the periphery of a scene.