The author develops the primary claim of the article in paragraph 4 by using humor and relatability to connect the characters' experiences with their respective issues regarding relationships. This interaction emphasizes shared struggles and a sense of community, which supports the idea of McDonald's serving as a public space where people from different backgrounds can come together and discuss personal challenges.
Given this analysis, the best answer would be:
B. He affirms the validity of his argument about McDonald's as a public space despite information that others may use to challenge it.