Answer:
D. It clarifies the author's intent to create a new government and the reasons for it
Step-by-step explanation:
The first line clarifies that the colonies have been suffering, and it is now necessary for them to create a new government. Then, in the next sentences it shows how the King and Great Britain had a history of acting tyrannical over the states. Knowing this, the most correct answer would be D. This is because there is the clarification that there is intent to create a new government "...such is now the necessity which constrains them to alter their former systems of government." Next, the reasons for it are "King of Great Britain is a history of repeated injuries and usurpations..." This shows the reason for creating a new government, because the King does not treat the states well.
Hope this helps!! If you have any questions about what I said please leave them down in the comments!