Which user experience (UX) guideline for Windows Store applications should you use?

You are designing a Windows Store application.
You need to design the application so that users can share content by connecting two or
more devices by physically tapping the devices together.
Which user experience (UX) guideline for Windows Store applications should you use?

A.
Share and data exchange

B.
location-awareness

C.
device-awareness

D.
proximity gestures