Barry Has Asked That You Give Him a Pop Quiz

Barry has asked that you give him a pop quiz on the features of Windows Live Hotmail. You are ready and ask him the questions below.
-Finally, you ask Barry what a "category" is in term of Windows Live Mail. He replies, correctly, that it is ____.

A) a group of email addresses saved together in Contacts
B) another name for the columns in the message list
C) the same as a folder
D) another name for the version of the software that is being used, such as "Category XP" or "Category 7"