Final answer:
The Declaration of Independence discusses natural rights, lists complaints against King George III, and formally declares the United States as an independent nation. Therefore, all of the options listed are present in the document.
Step-by-step explanation:
Contents of the Declaration of Independence
The Declaration of Independence contains several foundational elements that articulate the American colonies' decision to declare themselves an independent nation.
Firstly, it discusses the natural rights of humans, following the philosophy of John Locke and the Enlightenment principles of individual sovereignty.
Secondly, the Declaration includes a list of complaints against the authoritarian rule of King George III, detailing the perceived injustices and acts of tyranny that led the colonies to seek independence.
Lastly, the document serves as a formal announcement that the United States was asserting itself as an independent and sovereign nation. Hence, the correct answer to what was included in the Declaration of Independence is 'D. All of the above.'