My answers were polite one or two syllable replies , hoping that he would get the hint . He did not . So he chatted on for about 5 mins before he finally caught on and the conversation died away . I reached Bukit Merah at 8 am so I had some choice of seating . The earlier birds had all occupied the back rows and the next available empty seat was about mid way of the auditorium .

Question: What can plausibly be the hint to which the author makes reference in the paragraph ?
Answer: The author was hoping that the speaker would understand that they wanted to sit in a different seat .None of the above choices .The author is referring to the fact that they were not interested in having a conversation with the speaker .The author most likely means that the speaker should have sensed that they were upset about something .