my best answer would be The legal authority to take action.. choice D
The main goal of craft unions like the American Federation of Labor that formed during the late 1800s in the US was "<span>Improving wages and working conditions," since these organizations allowed employees to negotiate with more power against their companies. </span>
1.)To represent all of the people. if one branch had all of the power, there would be no way to keep them in control.
2.)to legislate and to represent the voters
3.) oversight function
hope this helps!
The first answer is right i think