【正确答案】 B

【答案解析】[分析] 推理题。根据文中第一自然段中“And even if he does not become very rich，he wants people to think that he is．That is what keeping up with the Joneses’is about．”我们可以推出原因在于他们想让别人认为他们和周围的人一样富有。所以，选B正确。