Evaluated receipt settlement reduces the threat of

Evaluated receipt settlement makes invoices redundant.  
Because of this reduces the threat of invoicing errors.

B) hypothesis. its guessing and your guess could be changed quickly based on the information.

To solve their problems, mesopotamians used irrigation, a way of supplying water to an area of land. to irrigate their land, they dug out large storafe basins to hold water supplies these ditches brought water to the feilds. to protect their feilds from flooding, farmers built up the banks of the tigris and euphrates.hope ths !