You are employed as a developer at ABC.com. ABC.com has a single Active Directory domain,
named ABC.com.
You are running a training exercise for junior developers. You are currently discussing Panning
behaviours. You are dealing with snap points.
Which of the following are valid types of snap points? (Choose all that apply.)

A.
Freeform

B.
Mandatory

C.
Rails

D.
Proximity

E.
Single axis

Explanation:
http://msdn.microsoft.com/en-us/library/windows/apps/hh465310.aspx