Really starting to feel that I'm over thinking some of these early questions.. that being said,
What exactly is the conclusion of this argument? I definitely got the intuition that the author was against us learning the lessons (i.e it just is not practical, doesn't make sense etc). But because it was not explicitly stated I was hesitant to make that leap.
Then I went looking for an explicit conclusion and found "it is nearly impossible to discover its lessons". In hindsight, this looks more like an intermediate conclusion to me. Anyways so then I saw answer choice (B) and I was like ok the author says "NEARLY impossible" so sure, it is compatible with accepting the argument's conclusion as well as denying it.
So really when is that leap from evidence to conclusion valid? Is it only valid here because its question 10, or is it something that I should keep in mind for the whole section. If something is strongly, strongly suggestive of a conclusion - even if its implicit, it probably still is a conclusion.