<span>"Improved land and water transportation allowed the U.S. to develop more industry and create a cash crop agricultural system." is the choice you're looking for. </span>
The six purposes of the government are as follows:
1- to form a more perfect union.
2- establish justice: by fair and reasonable laws and punishments
3- insure domestic tranquility: this means protecting Americans from other Americans
4- provide a common defense: to protect Americans from any outside forces
5- promote a general welfare for the benefit of citizens
6- secure the blessing of the liberty: this means that citizens have the legal right to life, liberty and pursuing happiness.
I believe that is Vertical Integration.
