When You Close a Document in Office 2013,what Happens to the Application

Multiple Choice

When you close a document in Office 2013,what happens to the application?

A) It automatically remains open for a minimum of 10 additional minutes.
B) It also closes with the document.
C) If you close two of more documents simultaneously, the application closes; if only one document is closed, the application remains open.
D) The application remains open.