To determine which quotation best supports the answer to Part A, it is important to understand what Part A was asking. If Part A discusses the impact of social media on people's ability to be present in the moment or reflects on the superficiality of social interactions stemming from online behaviors, then the best supporting quotation would be:
B. "a sea of tourists became so preoccupied with capturing the perfect, shareable picture that, ironically, 'no one was really present.'" (Paragraph 4)
This quote directly addresses the theme of how the obsession with taking photos for social media leads to a lack of presence and engagement in real life, aligning closely with themes often examined in discussions about social media's effects on society.