Final answer:
The U.S. Declaration of Independence begins with the premise that all people are entitled to certain inalienable rights, leading to the conclusion that Americans must form their own government. Option A, stating that all people are equally entitled to certain rights, best completes its logical flow of reasoning.
Step-by-step explanation:
The logical flow of reasoning in the U.S. Declaration of Independence starts with a fundamental premise and leads to a conclusion. This premise is encapsulated in statement A: All people are equally entitled to certain rights. This assertion is built upon the Enlightenment principles and the philosophy of John Locke, recognizing the natural rights of individuals, including life, liberty, and the pursuit of happiness.
Following this premise, statement II highlights that the rights of the American colonists had been violated by the British government. Finally, statement III culminates in the conclusion that Americans must establish their own government to protect these inalienable rights.
Given this logical structure, the statement that best completes this flow of reasoning is option A, because it serves as the ethical and intellectual foundation from which the subsequent violations and need for independent governance are argued.