De or het feedbackbrief?

The correct Dutch article is:

de feedbackbrief

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

How to use feedbackbrief

the feedbackbriefde feedbackbrief
this feedbackbriefdeze feedbackbrief
that feedbackbriefdie feedbackbrief
our feedbackbriefonze feedbackbrief
your feedbackbriefjouw feedbackbrief
every feedbackbriefelke feedbackbrief
which feedbackbrief?welke feedbackbrief?
a big feedbackbrief / the big feedbackbriefeen grote feedbackbrief, de grote feedbackbrief