Please answer the following question: Read the article and select the best answer. Article: Mrs Smith's husband went off on a business trip to Australia. He wanted to catch the 3:30 plane to Darwin. She was very surprised when he telephoned her at 5 o'clock and said that he was still at the airport. "What happened?" asked Mrs Smith. "Well," said Mr Smith, "everything was going fine. I got my ticket, checked my luggage and waited in line at the gate. I walked across the runway to the airplane and I saw my friend Jack Scott. Jack was an airplane engineer. I shouted to him and a policeman caught me." "Why did he catch you?" "I don't know," said Mr Smith," All I said was 'Hi, Jack! '" The word "hijack" means "to take control of a plane by force". Question: Why was Mr Smith caught by the policeman? Options: A: Because he didn't keep silence at the airport. B: Because he greeted an airport engineer named Jack. C: Because the pronunciation of "Hi, Jack" has another frightful meaning. D: Because the policeman didn't know English.
Answer:
C