In the beginning of "The Great Gatsby", Nick brags that he is not at all judgmental and is able to understand where people are coming from. This leads him to trusting people and thinking the best of them. By the end of the novel, after he has had so many uncomfortable and unfortunate experiences tangled up in the lives of Gatsby, Daisy, Tom, Jordan, etc, Nick finds himself to be very judgmental of their lifestyle and personalities, especially the Buchanans. He removes himself from their company and becomes more reserved, less trusting.
A) Stamina I'm pretty sure
The answer IS D. The speaker’s paranoia becomes more pronounced.
The answer is:
B. It is in iambic pentameter and doesn't rhyme.
That is why it's called blank verse! :)