The National Reclamation Act funded irrigation projects in West America. So, as you can imagine - the most likely answer here is B! =)
I would say the best answer to this question would be option C "unelected head of state." Just because monarchy is like a kingdom and the throne can be handed down to anyone who doesn't have to be elected. It isn't none of the other options because the United States has a democracy and also has a constitution, political parties, and representatives who make laws. While monarchy is ran by a king.
Hope this helps.
I think the answer would be manufacturing industry .
Taxation , judicial corruption ,raising and farming a army ,ceasing the hostility and the pursuit of natives