Correct Option: D. Bill of Rights Explanation of the Correct Answer The term "inalienable rights" refers to fundamental rights that cannot be surrendered, transferred, or removed. These rights are often seen as inherent to all individuals simply by virtue of being human. In many democratic societies, these rights are protected and guaranteed through a formal document known as a "Bill of Rights."

1. Definition of a Bill of Rights: A Bill of Rights is a formal declaration of the fundamental rights and freedoms that are guaranteed to all citizens. It serves as a legal safeguard against the infringement of these rights by the government or other entities. Examples include the United States Bill of Rights, which comprises the first ten amendments to the U.S. Constitution, and similar documents in other countries.
2. Legal Protection: The Bill of Rights provides a clear and accessible framework for citizens to understand their rights. It also establishes legal recourse for individuals whose rights have been violated. Courts can refer to the Bill of Rights when making decisions, ensuring that citizens have a means to challenge unjust laws or government actions.
3. Civic Education: Understanding the Bill of Rights is crucial in civic education as it empowers citizens to know their rights and responsibilities. It fosters a culture of respect for individual freedoms and promotes active participation in governance.

Why the Other Options Are Incorrect or Weaker A. An unwritten constitution: - An unwritten constitution, while it can provide flexibility and adaptability, does not guarantee inalienable rights in a clear and enforceable manner. Countries with unwritten constitutions, like the United Kingdom, rely on statutes, conventions, and judicial decisions to protect rights, which can lead to ambiguity and inconsistency. Without a formal Bill of Rights, citizens may find it challenging to assert their rights definitively. B. Parliamentary system of government: - A parliamentary system refers to a type of government where the executive branch derives its legitimacy from the legislature (parliament) and is accountable to it. While such a system can promote democratic governance, it does not inherently guarantee the protection of inalienable rights. The effectiveness of rights protection in a parliamentary system depends on the existence of laws and frameworks, such as a Bill of Rights, that explicitly outline and protect those rights. C. Unitary system of government: - A unitary system is one where power is centralized in a single national government, as opposed to being distributed among various levels of government (like in a federal system). While a unitary system can be efficient in governance, it does not automatically ensure the protection of inalienable rights. The rights of citizens can still be at risk if there are no specific legal protections in place, such as a Bill of Rights. Summary of Key Points

• Inalienable rights are fundamental rights inherent to all individuals and cannot be taken away.
• A Bill of Rights is a formal document that explicitly guarantees these rights, providing legal protection and recourse for citizens.
• Other systems, such as an unwritten constitution, parliamentary systems, and unitary governments, do not inherently guarantee the protection of inalienable rights without a formalized framework.
• Understanding the Bill of Rights is essential in civic education, empowering citizens to know and defend their rights.