The answer is:
b to convince readers that Britain has treated the colonists unfairly.
In the excerpt from the Declaration of Independence, the author mentions how Britain has has unjust methods. First, he acknowledges British "attempts by their legislature," usurpation, and the fact that the English government has has not listened to the colonies' claim for justice, even though Americans are their descendants.
The answer to your question is
A
A statement or theory that is put forward as a premise to be maintained or proved
! “And the kings of the earth, who have committed fornication and lived deliciously with her,
Shall bewail her, and lament for her, when they shall see the smoke of her burning,
Standing afar off for the fear of her torment, saying, Alas, alas, that great city Babylon,
that mighty city! For in one hour is thy judgment come .
The author fears the day of judgement .
Independent clause and subordinate clause