I think is NOT GIVEN.
There is no information about "be paid".
Even though there is "voluntary", no explanation is given.
Let us know.
Ok, now this is a question to me is very misleading and I disagree with your choice. Funny thing is , it's the correct answer according to Ielts practice website I got it from. My choice, just like
@itsme22 choice was False.
Here's what I know what
voluntary means.
adjective:-
done, given, or acting of one's own free will.
"we are funded by voluntary contributions"
synonyms: optional, discretionary, at one's discretion, elective, non-compulsory, non-mandatory, not required, open, open to choice, volitional, up to the individual;
working, done, or maintained without payment.
"a voluntary helper"
synonyms: unpaid, nonsalaried, without pay, without payment, free of charge, without charge, for nothing, for free.
So please tell me how that can be Not Given just because "paid " is not in the passage? I totally disagree. That should be False for the answer.