Answer:
The answer is: When a government uses a law to oppress a group of people.
Step-by-step explanation:
Unfortunately, the last two options and the first one --although they should be consider as a justification to break the law--, they can't be, as neither of them mentions an authority. For instance, number one mentions the law itself discrimintaing, but the law is already know, we can break it but it'll still be considere "illegal". The last two options are simply considered as "opinions" and cannot break it just because of that, no strong arguments. However in the second option, the government is being mentioned, and there we can definitely break it, as the government is deliberately oppresing people.