The correct answer is: They protect the property rights of citizens.
Explanation: Both the Manden Charter and the Declaration of the Rights of Man and of the Citizen emphasize the importance of property rights. They establish that individuals have the right to own property and that these rights should be protected by law. The Manden Charter, a significant document in West African history, outlines the rights of citizens, including protection of property, while the Declaration of the Rights of Man and of the Citizen, a foundational document of the French Revolution, similarly affirms the protection of property as a fundamental human right. The other options do not accurately represent the core principles highlighted in these documents.