Which of the following is the best example of an appropriately-narrowed topic for an informational research paper? the civil war civil war heroes the most popular musket in 1863 advances in weaponry during the civil war

advances in weaponry during the Civil War

The topics about the Civil War and Civil War heroes are too broad. There is way too much information that exists about the Civil War, and there were so many heroes that the paper would just be a list. The most popular musket topic is too narrow, there is just one answer for that. This topic is appropriate because it's specific enough, focusing just on how weapons were advanced in that specific period, but broad enough that there would be enough to write about.

What story is it we're talking about?