Which area of europe was known as the "powder keg" of europe prior to the outbreak of world war i?

Explanation:

It's the rights of the accused.

D is your second best answer, I think. But likely law enforcement has gone beyond just accusing someone. They now have a sentence to serve.

B is an entirely different set of rights which has nothing to do with the amendments cited.

A is also not applicable. It is clear that these are the rights of those accused which has nothing to do with public facilities.