De or het karteling?

The correct Dutch article is:

de karteling

Rule Words ending in -ing: almost always de. See the rule

How to use karteling

the kartelingde karteling
this kartelingdeze karteling
that kartelingdie karteling
our kartelingonze karteling
your kartelingjouw karteling
every kartelingelke karteling
which karteling?welke karteling?
a big karteling / the big kartelingeen grote karteling, de grote karteling