De or het olieverslaving?

The correct Dutch article is:

de olieverslaving

Rule Words ending in -ing: almost always de. See the rule

How to use olieverslaving

the olieverslavingde olieverslaving
this olieverslavingdeze olieverslaving
that olieverslavingdie olieverslaving
our olieverslavingonze olieverslaving
your olieverslavingjouw olieverslaving
every olieverslavingelke olieverslaving
which olieverslaving?welke olieverslaving?
a big olieverslaving / the big olieverslavingeen grote olieverslaving, de grote olieverslaving