De or het massaconsumptie?

The correct Dutch article is:

de massaconsumptie

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

How to use massaconsumptie

the massaconsumptiede massaconsumptie
this massaconsumptiedeze massaconsumptie
that massaconsumptiedie massaconsumptie
our massaconsumptieonze massaconsumptie
your massaconsumptiejouw massaconsumptie
every massaconsumptieelke massaconsumptie
which massaconsumptie?welke massaconsumptie?
a big massaconsumptie / the big massaconsumptieeen grote massaconsumptie, de grote massaconsumptie