Two users share the same Windows 7 computer. The first user creates a document intended to be used by both users, and then logs off. The second user logs on and types the name of the document in the Start menu, but the document is not found. Which of the following is the problem?（）

• A、The document is set to hidden.
• B、The document is locked.
• C、The document was saved as a system document.
• D、The document is owned by the first user.