Eighteen minutes later , having driven an average speed of 80 mph , we 're back at our house to collect the tickets . Forty - five minutes later , we 're at the airport . Unfortunately , we 're three minutes late for the final check - in .

Question: Why were they late for check - in at the airport ?
Answer: None of the above choices .They had gotten lost trying to find their flight .They had left their tickets at home on accident .They were unable to leave at an earlier time .