which of the following statement is true about the atkinson-shiffrin model? a. The Atkinson-Shiffrin model proposes the existence of three separate memory stores. b. The Atkinson-Shiffrin model only includes two memory stores - short-term memory and long-term memory. c. The Atkinson-Shiffrin model suggests that information is processed sequentially through sensory memory, short-term memory, and then long-term memory. d. The Atkinson-Shiffrin model is a non-traditional model of memory that focuses on emotional and sensory memory rather than traditional cognitive processes.