This question is really opinion based, but I would take it personal when things go wrong, since I start to think what I didn't or did do that made things go wrong.
The cataracts kept lower Egypt from coming up the Nile to trade. It made trade decline between the two.
I would say that it is the third one.
I believe the answer is administrative<span> regulations.
The primary source of law will include all laws/regulations that are formally issued by the Government.
Examples of primary source of laws are Treaties, administrative regulations, decision made by the court, legislatures, and executive orders.</span>
