De or het dossierbehandeling?

The correct Dutch article is:

de dossierbehandeling

Rule Words ending in -ing: almost always de. See the rule

This word is not in the word lists we use to double-check answers.

How to use dossierbehandeling

the dossierbehandelingde dossierbehandeling
this dossierbehandelingdeze dossierbehandeling
that dossierbehandelingdie dossierbehandeling
our dossierbehandelingonze dossierbehandeling
your dossierbehandelingjouw dossierbehandeling
every dossierbehandelingelke dossierbehandeling
which dossierbehandeling?welke dossierbehandeling?
a big dossierbehandeling / the big dossierbehandelingeen grote dossierbehandeling, de grote dossierbehandeling