Illusory conjunctions occur when __________.

A) a subject reports having seen a stimulus even after they have been told it is not included in an array
B) when subjects become confused about how the various aspects of a display were bundled together
C) when subjects think they saw something because it is important to them
D) all of the above

Illusory conjunctions occur when subjects become confused about how the various aspects of a display were bundled together, leading them to incorrectly combine features from different objects presented in the display. Option A refers to the phenomenon of false positives or false alarms, and option C refers to the impact of top-down processing and attention on perception, which may influence what people pay attention to or remember, but is not directly related to illusory conjunctions.