De or het commissiebehandeling?

The correct Dutch article is:

de commissiebehandeling

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

How to use commissiebehandeling

the commissiebehandelingde commissiebehandeling
this commissiebehandelingdeze commissiebehandeling
that commissiebehandelingdie commissiebehandeling
our commissiebehandelingonze commissiebehandeling
your commissiebehandelingjouw commissiebehandeling
every commissiebehandelingelke commissiebehandeling
which commissiebehandeling?welke commissiebehandeling?
a big commissiebehandeling / the big commissiebehandelingeen grote commissiebehandeling, de grote commissiebehandeling