De or het collegegelddifferentiatie?

The correct Dutch article is:

de collegegelddifferentiatie

Rule Words ending in -tie and -sie: almost always de. See the rule

How to use collegegelddifferentiatie

the collegegelddifferentiatiede collegegelddifferentiatie
this collegegelddifferentiatiedeze collegegelddifferentiatie
that collegegelddifferentiatiedie collegegelddifferentiatie
our collegegelddifferentiatieonze collegegelddifferentiatie
your collegegelddifferentiatiejouw collegegelddifferentiatie
every collegegelddifferentiatieelke collegegelddifferentiatie
which collegegelddifferentiatie?welke collegegelddifferentiatie?
a big collegegelddifferentiatie / the big collegegelddifferentiatieeen grote collegegelddifferentiatie, de grote collegegelddifferentiatie