People Can Often Work on Two Unrelated Tasks (Such as Remembering

People can often work on two unrelated tasks (such as remembering a series of 5 digits while also doing a visual task) with less interference between the tasks than one might expect. This fact has been taken as support for the idea that

A) short-term and long-term memory are really the same thing.
B) working memory is made up of more than one component.
C) memories are stored in subcortical, not cortical, structures.
D) memories processed in the left hemisphere do not interact with memories processed in the right hemisphere.