De or het marketingcommunicatie?

The correct Dutch article is:

de marketingcommunicatie

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

How to use marketingcommunicatie

the marketingcommunicatiede marketingcommunicatie
this marketingcommunicatiedeze marketingcommunicatie
that marketingcommunicatiedie marketingcommunicatie
our marketingcommunicatieonze marketingcommunicatie
your marketingcommunicatiejouw marketingcommunicatie
every marketingcommunicatieelke marketingcommunicatie
which marketingcommunicatie?welke marketingcommunicatie?
a big marketingcommunicatie / the big marketingcommunicatieeen grote marketingcommunicatie, de grote marketingcommunicatie