Acommon feature of the first state constitutions was:
a. trial by jury
c. freedom of assembly
b. popular sovereignty
d. due process

A common feature of the first state constitutions was popular sovereignty - b. 

The correct answer is popular sovereignty - b. 

What is important is that such governments only existed when a consent of the people who were governed was also present. 

The changes to agriculture in the united states since 1900 is that increased mechanization has increased food production, thereby increasing the need for labor. there has been an increased need for higher speeds of food production due the fact that the population in the united states continues to rise.