De or het klantbestelling?

The correct Dutch article is:

de klantbestelling

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

This word is not in the word lists we use to double-check answers.

How to use klantbestelling

the klantbestellingde klantbestelling
this klantbestellingdeze klantbestelling
that klantbestellingdie klantbestelling
our klantbestellingonze klantbestelling
your klantbestellingjouw klantbestelling
every klantbestellingelke klantbestelling
which klantbestelling?welke klantbestelling?
a big klantbestelling / the big klantbestellingeen grote klantbestelling, de grote klantbestelling