De or het classificatiecommissie?

The correct Dutch article is:

de classificatiecommissie

Rule Words ending in -tie and -sie: almost always de. See the rule

How to use classificatiecommissie

the classificatiecommissiede classificatiecommissie
this classificatiecommissiedeze classificatiecommissie
that classificatiecommissiedie classificatiecommissie
our classificatiecommissieonze classificatiecommissie
your classificatiecommissiejouw classificatiecommissie
every classificatiecommissieelke classificatiecommissie
which classificatiecommissie?welke classificatiecommissie?
a big classificatiecommissie / the big classificatiecommissieeen grote classificatiecommissie, de grote classificatiecommissie