What function did the Grand Canal have during the Song Dynasty?

A. Easier and cheaper transportation of rice
B. Allowed for more irrigation of fields
C. Served as a barrier to invaders
D. None of the above are true

According to your text, systems of government in the united states are shifting from what to what?

Janette goes into an electronics superstore to buy a new computer. the salesperson works with her to find the right model, and she agrees to buy a new computer for $500 and a floor-model 18-inch monitor for $100. just when she is ready to pay, the salesperson walks away for a minute and then comes back to inform her that the monitor she was ready to purchase can't be sold for < $125. she agrees to the extra $25 even though they had initially agreed on the $100 selling price. janette has fallen for the technique of gaining compliance.

What are the most populous and least populous areas of russia? and why are some areas more heavily populated than others?