Final answer:
The characteristic that best describes Roger's perspective in the passage is disillusionment, which reflects his disappointment and alienation.
Therefore, option D is correct.
Step-by-step explanation:
The passage describes a character, Roger, who is observing others during a difficult time and is unable to understand their emotions. He sees people who were once deeply in love now appearing giddy despite the adversity they face. The characteristic that best describes Roger's perspective in this passage is disillusionment. This term refers to a feeling of disappointment resulting from the discovery that something is not as good as one believed it to be. Roger's inability to connect with the emotions of others showcases his sense of alienation and loss of faith in the positivity and strength of human relationships during tough times, capturing the essence of disillusionment.