De or het kostenbenadering?

The correct Dutch article is:

de kostenbenadering

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

How to use kostenbenadering

the kostenbenaderingde kostenbenadering
this kostenbenaderingdeze kostenbenadering
that kostenbenaderingdie kostenbenadering
our kostenbenaderingonze kostenbenadering
your kostenbenaderingjouw kostenbenadering
every kostenbenaderingelke kostenbenadering
which kostenbenadering?welke kostenbenadering?
a big kostenbenadering / the big kostenbenaderingeen grote kostenbenadering, de grote kostenbenadering