Why didn’t the old man answer at once[A] He didn’t hear what the man said.[B] He didn’t like the man.[C] He didn’t know how fast the stranger could walk.
After watching him for a minute or two, the old man called after him. "My friend, it will take you only fifteen minutes." The stranger turned around and said, "Well, why didn’t you tell me that before" "How could I Because I didn’t know how fast you could walk.\