Question

activists assert that slavery persists today, even in countries where it has been abolished. what does this tell us about rights?
legal rights are meaningless.
some people do not fight hard enough for their rights.
legal entitlement to a right does not guarantee true access to that right.

Explanation:

Activists' assertion about slavery persisting despite legal abolition shows that having a legal right (like abolition) is not enough. There could be various barriers (social, economic, enforcement - related etc.) that prevent people from actually accessing or enjoying that right. So, it implies that just having a legal entitlement (a right on paper) does not ensure that people can actually exercise or have true access to that right.

Answer:

Legal entitlement to a right does not guarantee true access to that right.