What is the Grand Canal?

the Grand canal is the longest canal or artifical river in the world

Explanation:

It was built to enable successive Chinese regimes to transport surplus grain from the agriculturally rich Yangtze (Chang) and Huai river valleys to feed the capital cities and large standing armies in northern China. Cargo barges on the Grand Canal at Suzhou, Jiangsu province, China.

Or you could put

The canal was built in order to easily ship grain from the rich farmland in southern China to the capital city in Beijing. This also helped the emperors to feed the soldiers guarding the northern borders. The Ancient Chinese built early canals to help with transportation and commerce.

Or

The grand canal is an inland waterway 1000 miles long in eastern China; extends from Tianjin in the north to Hangzhou in the south. see more. example of: canal. long and narrow strip of water made for boats or for irrigation.

b. martin luther king jr. wrote and spoke "i have a dream"

explanation:

i know this 100 percent is correct   b. is the best one. < 3