With no explanation, label text_A→text_B with either "DON'T KNOW", "NO" or "YES".
text_A: At the wedding of Angus and Laura in Somerset, the single best man Charles, his flatmate Scarlett; his friend Fiona and her brother Tom; Gareth, a gay man, and his Scottish lover Matthew; and Charles's deaf brother David endure the festivities. At the reception, Charles becomes smitten with Caroline (Carrie), a beautiful young American, and the two spend the night together. In the morning, Carrie jokingly demands that Charles propose to her, observing that they may have "missed a great opportunity", and then leaves for America.
text_B: Would it be socially appropriate for Angus to set up Charles on a date?
YES.