Could it also be they do not like the skirt?
With context, yes.
That's what i wrote and it said it was wrong. App should be better at taking these alternative answers
Not really.. If you want to say that, the sentence should be "Mereka tidak suka rok itu". Then you're referring to a specific skirt. The sentence used by Duo is referring to skirts in general.
P.S. I was born in Indonesia btw..
Got this as an audio question, and it sounded a lot like they were saying "Roh" rather than "Rok" That answer was accepted as well.
There's a glottal stop befor k in many words. Tida'k, ngga'k, bapa'k.
Mmm, it sounds correct now. I don't know if I'm just a bit better at hearing the subtleties of Indonesian now or the audio has changed.
And how do we know if it's plural or not?
You don't without context
In my experience, you only use explicit plurals in Indonesian when you want to emphasise the plurality. In thise case you're talking about the general concept of skirts, so no need to pluralise.