The Cocktail Party Effect and Results from Dichotic Listening Tasks

The cocktail party effect and results from dichotic listening tasks have revealed interesting information about selective attention. Which of the following is an accurate conclusion based on these results?

A) Information we have filtered out of our attention is still being processed at some unconscious level.
B) Individual pathways of sense receptors are not cross-modal in their processing.
C) Selective attention only allows us to process one channel of input at a time.
D) We constantly engage in dichotic listening and attend to all messages equally.