An Afterimage When Viewed in the Dark Appears to Move

Multiple Choice

 An afterimage when viewed in the dark appears to move when you move your eyes. The corollary discharge theory predicts this because _____.

A) there is an IDS, but not a CDS
B) there is no IDS, but there is a CDS
C) there is no IDS and no CDS
D) there is both IDS and CDS