When the full moon appears near the horizon, 6­year­old Mallory says, "The moon is bigger tonight than last night.". Last night, Mallory saw the moon later in the night, when it was high in the sky. Mallory's experience is an example of the

a. apparent movement illusion.
b. stroboscopic effect.
c. Müller­Lyer illusion.
d. Ponzo illusion.
e. moon illusion.