De or het kernassortiment?

The correct Dutch article is:

het kernassortiment

Rule Words ending in -ment: usually het. See the rule

How to use kernassortiment

the kernassortimenthet kernassortiment
this kernassortimentdit kernassortiment
that kernassortimentdat kernassortiment
our kernassortimentons kernassortiment
your kernassortimentjouw kernassortiment
every kernassortimentelk kernassortiment
which kernassortiment?welk kernassortiment?
a big kernassortiment / the big kernassortimenteen groot kernassortiment, het grote kernassortiment