Which storage technology should you use?

You plan to develop a Windows Store app to create pictures.
Users of the app will be able to save the pictures that they create and to share the pictures
with friends by using a web link.
You need to ensure that the friends can makes comments on the shared pictures.
Which storage technology should you use? (More than one answer choice may achieve the
goal. Select the BEST answer.)

A.
Windows Azure blob storage

B.
roaming storage