What effect did the invention of irrigation systems have on both ancient Egypt and Mesopotamia? A.

It reduced farmers’ dependence on aid from the pharaoh.
B.

It brought fresh-water supplies to desert areas.
C.

It helped to cause flooding in the areas around the rivers.
D.

It increased trade across the Mediterranean Sea.

pls answer because I have a test about this question..

A. identify the constitutional clause that is common to both mccutcheon v. federal election commission (2014) and citizens united v. federal election commission (2010). based on the constitutional clause identified in part a, explain why the facts of citizens united v. federal election commission (2010) led to a similar holding to the holding in mccutcheon v. federal election commission (2014). describe an action that members of the public who disagree with the holding in mccutcheon v. federal election commission could take to limit its impact.