De or het concessieverlening?

The correct Dutch article is:

de concessieverlening

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

How to use concessieverlening

the concessieverleningde concessieverlening
this concessieverleningdeze concessieverlening
that concessieverleningdie concessieverlening
our concessieverleningonze concessieverlening
your concessieverleningjouw concessieverlening
every concessieverleningelke concessieverlening
which concessieverlening?welke concessieverlening?
a big concessieverlening / the big concessieverleningeen grote concessieverlening, de grote concessieverlening