Life of Pi<span> even flirts with nonfiction genres. The Author's Note, for example, claims that the story of Piscine Molitor Patel is a true story that the author, Yann Martel, heard while backpacking through Pondicherry, and the novel, with its first-person narrator, is structured as a memoir.</span>
The correct option is HARD PLEASURE.
An oxymoron refers to a compound word (two words written together) whose meaning are contradictory to each other. The two words that are used together in oxymoron usually have completely opposite meaning and authors usually use it to engage the interest of the readers. For instance in the correct option mentioned above, hard and pleasure has opposite meanings. Other examples of oxymoron are: same difference, bitter sweet, alone together, open secret, original copy, etc.
I believe the answer is B. Nguyen explains how buses reduce traffic by lowering the number of cars on the road.
The passage says “Clearly, buses reduce traffic rather than cause it”. Answer B is the only answer that mentions traffic in a logical way.
I hope this helps!