Within Working Memory, "Helpers" Like the Visuospatial Buffer and Articulatory

Within working memory, "helpers" like the visuospatial buffer and articulatory rehearsal loop:

A) can take over some of the lower-level analyses ordinarily performed by the central executive
B) can provide verbal, but not visual, analysis of the memory items
C) provide short-term storage of items likely to be needed shortly by the central executive
D) preserve the items to be remembered in their initial sensory form (e.g., visual stimuli are preserved as visual images)