D.
God would defend the American colonists' fight because their cause was upright.
Explanation:
The phrases "God Almighty will not give up a people to military destruction, or leave them unsupportedly to perish"
and
"Neither have I so much of the infidel in me, as to suppose that He has relinquished the government of the world, and given us up to the care of devils" and in fact this whole excerpt of the Thomas Paine's essay "The Crisis Number One" supports this sentence/conclusion i.e. "God would defend the American colonists' fight because their cause was upright."
