Read: 'China's high-speed rail network is the largest in the world. Trains travel at speeds exceeding 300 km/h. The network connects major cities that once required overnight travel. ___.' Which sentence adds the most logical supporting detail?
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A
China also has a large network of expressways for car travel.
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B
Passengers can now travel from Beijing to Shanghai in under five hours.
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C
The construction of the network cost hundreds of billions of dollars.
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D
High-speed rail is also common in Japan and France.