D. Natural rights.
Step-by-step explanation:
Unalienable rights are rights that are given that cannot be taken away under any circumstances and will remain with the citizen forever.
The Declaration of Independence made sure to cover this and made it so the citizens felt as if they would not be abused or used by the government, since they had natural rights that came with them.
Natural rights is synonymous to unalienable rights, both cannot be taken away from the beholder and are natural, every citizen has them.