Final answer:
The correct answer is option A. The author likely viewed Louis XVI's execution as just and necessary, aligning with Republicans like Jefferson and Madison who believed it served a greater cause, rather than the Federalist view, which viewed it as anarchy and excessive violence.
Step-by-step explanation:
The author's view on Louis XVI's execution seems to criticize the extreme violence of the French Revolution, particularly the execution as a part of the Reign of Terror. In the provided excerpts, it is shown that various individuals, such as Thomas Paine and Federalists in the United States, objected to the extent of the violence.
Paine, although a supporter of the French Revolution, was imprisoned for opposing the king's execution, while Federalists saw the revolution's violence as a descent into anarchy.
Meanwhile, Jefferson and Madison saw the execution as necessary for progress. Based on the information, the author would likely be aligned with the perspective that views the execution of Louis XVI as a just act, as it fits with the Republican view that it served a greater cause. Thus, the correct option for the question on how the author viewed Louis XVI's execution would be A) The author celebrated Louis XVI's execution as a just and necessary act.