To answer this question i would need to have more information on what you are dealing with. If you can link this with more information that would be great.
I believe it is a claim because it does focus on the main idea and what the text/passage should be about. If not I deeply apologize.
The best government is that which governs least. No human depositories can, with safety, be trusted with the power of legislation upon the general interests of society so as to operate directly or indirectly on the industry and property of the community.
The answer would be true the phrase alone can be a sentence
The prefix of advantages is "ad"
hope this helps :)