100 POINTS AFTER YOU ANSWEER PLZZ HELP

The longest man-made waterway in the world was the Grand Canal of China. Why was this canal so important to the peasants of China?

1.the canal kept the cost of goods down while connecting to the far-flung provinces of China
2.the canal kept the costs of good down but made travel impossible for the common man
3.the canal gave jobs to hungry peasants
4.the canal made more goods available to the masses