以下有关京杭大运河的说法哪些是对？
A. It is the earliest, greatest and longest artificial river in the world.
B. The Grand Canal started in Beijing and ended in Hangzhou, which has a history of over 2,500 years.
C. The Grand Canal links the two longest rivers in China - the Yellow River and Yangtze River.
D. The total length of the Grand Canal is 1,794 kilometers
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