Explain how the powers of the Supreme Court and federal law were extended by significant court cases during this period. How did President Jefferson act on his beliefs about government?

I would say the correct answer is - It expresses an opinion.
It is clear that the person who said or wrote this sentence has a strong opinion about the topic, which makes it highly subjective. Obviously, this is not something that should be done in an objective historical summary where you have to eliminate emotions and opinions and just state facts.