A man and an elephant stand at the opposite ends of a narrow bridge. At a time only one can cross the bridge. The men tells the elephant to back off. What did the elephant say?

This is a riddle/joke question. The setup is a confrontation between a man and an elephant on a narrow bridge. The elephant's response would be the punchline. Since the options don't include the actual expected humorous response (which would be something like ' elephants don't talk' or a witty retort), the correct answer is 'None of these' - the real punchline isn't listed among the literal options.