De or het marketinginstrument?

The correct Dutch article is:

het marketinginstrument

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

How to use marketinginstrument

the marketinginstrumenthet marketinginstrument
this marketinginstrumentdit marketinginstrument
that marketinginstrumentdat marketinginstrument
our marketinginstrumentons marketinginstrument
your marketinginstrumentjouw marketinginstrument
every marketinginstrumentelk marketinginstrument
which marketinginstrument?welk marketinginstrument?
a big marketinginstrument / the big marketinginstrumenteen groot marketinginstrument, het grote marketinginstrument