You are employed as a developer at ABC.com. ABC.com has a single Active Directory domain,
named ABC.com.
You are in the process of creating a new Windows Store app for ABC.com. The application will
include a hub page.
Which of the following is TRUE with regards to hub pages?

A.
They are the user’s entry point to the app.

B.
They are the second level of an app.

C.
They are the third level of an app.

D.
They are the fourth level of an app.

Explanation:
http://msdn.microsoft.com/en-us/library/windows/apps/hh761500.aspx