You are developing a Windows Store file transfer app that will allow the user to download files.
When Windows Internet Explorer encounters a hyperlink of the form myftp://<hostname>/<path>/<file>, the app
must download the corresponding file.
You need to ensure that the app implements the correct contract.
Which contract should you use?

A.
Cached File Updater

B.
Protocol Activation

C.
File Activation

D.
App to App Picking