Answer: the confederacy
Explanation: more powerful states and man power.
papermaking, gunpowder, compass.
In Europe, the 18th century brought about the Age of "Enlightenment," since this was the time when people started to question the nature on monarchical governments--leading to things like American and French Revolutions.
The correct answer is answer C ("The article will be biased because the historian is using only one source about the ruler").
If a historian only took this one scroll to write a biography on its subject (the ruler), it would most likely be extremely misleading and inaccurate. There's no way of getting closer to the truth of any subject without contrasting a variety of opinions from different sources. What if people working for this ruler wrote it in a way that made him look good? What if it was written under pressure? What if it was a complete lie? These and many other questions should come to mind as possible ways in which relying on one source might compromise historical facts.
Hope this helps!