Suppose That You Are Calculating Your Recent Expenses, and You

Suppose that you are calculating your recent expenses, and you are adding up five 2-digit numbers in your head. As you begin to calculate the final sum, you feel that you've reached the limits of your memory. This strain can be traced to

A) the difficulty of keeping all this material in your working memory.
B) the difficulty of transferring material from working memory to long-term memory.
C) a conflict between top-down and bottom-up processing.
D) material that is larger than the span of sensory memory.