Getting payed as a babysitter is an example of . price consumer index

market transaction

non market transaction

something included in GDP

I believe the answer is: b) They were discriminated against by potential employers.

The employers tend to pay foreign labours with smaller amount of salary compared to local workers.  Since not many of them speak our language, they did not able to fully explained their situation to the press or the court, which is why they are force to keep their head down and receive the unfair treatment.