Which inventions had the greatest impact on trade in china during the middle ages? (pick 2 or 3) 1.the water-powered clock 2. woodblock printing 3. the compass 4. gunpowder 5. paper money

 The correct answer is : 4. gunpowder and 5. paper money

Explanation:  The powder began to be used to make firecrackers, fireworks and flares to make signals. Then they invented weapons to use in war, in rifles and rockets.

Paper money has several advantages over the currency, it is more comfortable, a bill can replace several coins, it is lighter than the metal coins, but in itself the paper currency has no value as the coins were gold and silver.

(d) rivers.

explanation:

civilizations developed around rivers because their waters provided places to hunt and fish. also, as the rivers flooded, the lands around them became fertile. this allowed them to support farming. this is especially true of the nile river, which flooded the same time each year.

the governor can not veto a referendum that the voters approve