De or het redennering?

The correct Dutch article is:

de redennering

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 redennering

the redenneringde redennering
this redenneringdeze redennering
that redenneringdie redennering
our redenneringonze redennering
your redenneringjouw redennering
every redenneringelke redennering
which redennering?welke redennering?
a big redennering / the big redenneringeen grote redennering, de grote redennering