Which of these statements are true about executive orders? Select all that apply. A: They are issued by the president.

B: They must be directed at agencies and officials serving in the executive branch.

C: They do not have to be approved by Congress.

D: They can be struck down as unconstitutional by the judicial branch.

Well one of the many reasons was They were used to making small civilizations next to rivers so when it rained the rivers would flood the crops making the ground fertile, however when more people came and the built more houses they would get flooded to, so they had to move more in land.

I hope this helps.