In Psychologists' Current Conception of Working Memory, What Is the Relationship

In psychologists' current conception of working memory, what is the relationship between the phonological loop and the visuospatial sketchpad?

A) Information first enters the phonological loop and then gets transferred to the visuospatial sketchpad.
B) Information first enters the visuospatial sketchpad and then gets transferred to the phonological loop.
C) The phonological loop and visuospatial sketchpad handle different kinds of information, which do not interfere with each other.
D) Anything in the phonological loop is also processed simultaneously by the visuospatial sketchpad.