From the line "Buffett’s one concession........ privet " we can infer that Warren Buffet is old fashioned. Also he lives in a ordinary house which shows that he is a simple man. When he visited Paris, he had no interest in sight-seeing. On the beauty of sunset, he remarked that he had not focused on it. He rarely showed any feeling. All these inferences show that Warren is a deadpan. However from the passage, we cannot conclude that he was against planned economy. Similarly, nothing can be said about his spiritual life. Hence D is the answer.