C. People accused of crimes have specific constitutional protections.
The amendment explicitly states that no "cruel and unusual punishments" would be placed on a criminal, nor would they have to post "excessive bail". These are protections granted to protect accused people.
Choice A is wrong because it provides rights to people outside of the court.
Choice B is wrong because it does not address any of the specific forms of punishment the government can use.
Choice D is wrong because it states that the government cannot do whatever it pleases in terms of criminal punishment.
Hope this helps!!