Which of the following is the most accurate description of the capacity of short-term and working memory?

a. Lasts for about 2 days in most circumstances

b. Lasts for less than half a minute unless you rehearse the information

c. Is thought to be unlimited—there is always room for more information

d. Can handle about a half dozen items for each of the tasks you are working on at any time

e. Can handle about a half dozen items total