Answer: D. Emerson believes that in order to be a man of significance, one must be willing to be an
individual and outside of the mainstream.
Explanation:
The most insightful analysis of the ideas that Emerson expresses in this sentence is that Emerson believes that in order to be a man of significance, one must be willing to be an individual and outside of the mainstream.
According to Emerson, an individualistic person should not follow the crowd as what is considered to b good for others may not be the best thing to do. He simply means that one must be unique and standout from others and every decision one chooses must be based on the fact that that's the best decision to make and not because others are actually making that decision.
Therefore, the correct option is D.