A、There was traffic jam. B、The trains were delayed. C、He couldn’t find a bus stop. D、Something went wrong with his friend’s moto

M：Sorry, I’m late. Did you hear about the trains?
    W：Yes, I heard they were running late,
    M：Well, I realized I might be late, so I tried to find a bus and on my way I bumped into Jerry. He offered me a lift on his motorbike. But unfortunately, it was exhausted by flameout, so in the end, I had to walk.
    Question： Why is the man late?