My assumption to this sentence would be Music.
Answer:
D. it united the lands of China economically
Explanation:
The canal was also used as a courier route for carrying important government messages. In the 1400s, the Chinese government operated over 11,000 grain barges on the canal to transport food to the north. The Grand Canal also proved to be an excellent source of taxes for the Chinese government.
Hope this helped
<span>They became League of Nations mandates</span>
