De or het spionagezaak?

The correct Dutch article is:

de spionagezaak

How to use spionagezaak

the spionagezaakde spionagezaak
this spionagezaakdeze spionagezaak
that spionagezaakdie spionagezaak
our spionagezaakonze spionagezaak
your spionagezaakjouw spionagezaak
every spionagezaakelke spionagezaak
which spionagezaak?welke spionagezaak?
a big spionagezaak / the big spionagezaakeen grote spionagezaak, de grote spionagezaak