Reading Comprehension
从下列每篇短文的问题后所给的四个选择项中选出一个最佳答案。

     The question of whether dogs have a sense of humour is often fiercely argued. My own opinion is that some have and some haven’t. Dachshunds have, but not St Bernards or Great Danes. Apparently a dog has to be small to be fond of joke. You never find a Great Dane trying to be a comedian.
     But it is fatal to let any dog know that he is funny, for he immediately loses his head and starts overdoing it. As an example of this I would point to Rudolph, a dachshund I once owned, whose slogan was ”Anything for a Laugh”. Dachshunds are always the worst offenders in this respect because of their peculiar shape. It is only natural that when a dog finds that his mere appearance makes the viewing public laugh, he should imagine nature intended him to be a comedian.
     I had a cottage at the time outside an English village, not far from a farm where they kept ducks, and one day the farmer called on me to say his ducks were disappearing and suspicion had fallen on my Rudolph. Why? I asked, and he said because mine was the only dog in the neighbourhood except his own Towser and Towser had been so carefully trained that he would not touch a duck even if you brought it to him with orange sauce over it.
     I was very annoyed. I said he only had to gaze into Rudolph’s truthful brown eyes to see how baseless were his suspicions. Had he not, I asked, heard of foxes? How much more likely that a fox was the Bad Guy in the story. He was beginning to look doubtful and seemed about to make an apology, when Rudolph, who had been listening with interest and at a certain point had left the room, came trotting（小跑） in with a duck in his mouth.
     Yes, dachshunds overplay their sense of humour, and I suppose other dogs have their faults, but they seem unimportant compared with their virtues.