De or het regiopromotie?

The correct Dutch article is:

de regiopromotie

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

How to use regiopromotie

the regiopromotiede regiopromotie
this regiopromotiedeze regiopromotie
that regiopromotiedie regiopromotie
our regiopromotieonze regiopromotie
your regiopromotiejouw regiopromotie
every regiopromotieelke regiopromotie
which regiopromotie?welke regiopromotie?
a big regiopromotie / the big regiopromotieeen grote regiopromotie, de grote regiopromotie