(Choices, 3分) “When, today, cities are competing not just with other cities in their country or region, but literally every other city in the world, those cities that become more and more like other places, rather than highlighting their differentiation, are going to ultimately become less competitive.” Which of the following is the correct understanding of the above sentences?
选项：

A: Cities will be more competitive when they are completely different from other cities.
B: Cities of today become more and more like other places.They are going to be more competitive.
C: Cities of today are competing with other places by their differentiation. The more different, the more competitive.
D: Cities of today are actually competing with other cities around the world, and they will lose competitiveness if they lost their own feature.