Which river is connected to the Grand Canal (Letter S)?
A. Ganges
B. Volga
C. Yangtze
D. Indus

The River Yangtze is connected to the Grand Canal, hence option C is Correct.
The Grand Canal is the series of Waterways which connects Hangzhou in Zhejiang province to Beijing, thereby greatly helps in unifying North and South China.
The Grand Canal links five major river of China, these are Hai River, Huai River, Yangtze River, Yellow River and Qiantang River. Hence Option C is the correct answer.
Learn more about The Grand Canal here:
https://brainly.com/question/678857