Which requirement must be met?

You are developing a Windows Store style app.
You need to ensure that the app meets the requirements for Windows Store certification.
Which requirement must be met?

A.
The app must not display ads on tiles.

B.
The app must have a short name and a long name.

C.
The app must conform to the rating system E, Y-7,Y-14, MA.

D.
Ads that do not comply with the standard content policies must supply a content agreement.