As Arnold Was Walking Out the Door of His Apartment

As Arnold was walking out the door of his apartment, he was quickly running through a mental list of all the things he was supposed to take with him.He went through the complete list of items four or five times, just to make sure he hadn't forgotten anything.Based on Baddeley's model of working memory, Arnold was utilising

A) the visuospatial sketchpad to arrange all the information he needed.
B) the phonological loop to temporarily hold his list of essential items.
C) the central executive system to juggle all the information he needed to consider.
D) his prospective memory to remember the actions he still needed to perform.