De or het monopoliecommissie?

The correct Dutch article is:

de monopoliecommissie

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

How to use monopoliecommissie

the monopoliecommissiede monopoliecommissie
this monopoliecommissiedeze monopoliecommissie
that monopoliecommissiedie monopoliecommissie
our monopoliecommissieonze monopoliecommissie
your monopoliecommissiejouw monopoliecommissie
every monopoliecommissieelke monopoliecommissie
which monopoliecommissie?welke monopoliecommissie?
a big monopoliecommissie / the big monopoliecommissieeen grote monopoliecommissie, de grote monopoliecommissie