Which statement about D/D1 theory languages is correct?

1. The official computer exam is offered as a full English paper nationwide
2. Official sittings are in Dutch or French; Flanders may add audio in French, German or English, and Brussels may allow a German, English or sign-language interpreter
3. Only German is accepted in Brussels, and only English is accepted in Flanders
4. Wallonia requires English because international coaches operate there