题目

From the earliest times，man has been interested in art．People have often worked together to collect and save the world's art treasures． Fine art treasures from many countries are kept in an art museum called the Louvre in Paris，France．The works of art have been collected by the people of France over many centuries． The Louvre has not always been a museum．The first building was a fort（炮台）．In 1190，it was the king's castle with high walls and a round tower．It had a moat to keep out his enemies． Over the years，the number of buildings around the castle grew．By 1“没有最堵，只有更堵”，北京、武汉等城市因交通拥堵而被称为“堵城”。以下关于有效解决城市交通拥堵问题的措施，你认为不合理的是(　　)A.开辟公共汽车、自行车绿色通道B.限制私家车的使用C.减少市区主干道红绿灯设置D.合理规划城市道路