In the us government, citizens play a key role in
foreign policy.
business.
economic policy.
elections.

The correct answer is option D.

In the US government, citizens play a key role in the elections.

Explanation :

The United States is considered to be a representative democracy where the citizens play an active role in the governance of the country. The citizens elect and vote the government officials who represent the ideas and the concerns of the citizens on their behalf in the government.  

Further Explanation :

The United States experiences democracy in its true sense and it has been consistent in providing its citizens with the set of rights and liberties which the citizens enjoy to lead their lives in a better way. Not only is the right for the every qualified citizen to vote, it is moreover a responsibility for every citizen to play an active part in the governance process by casting their valuable vote.

Furthermore it is important here to highlight that the rest of the remaining three options – foreign policy, business and the economic policy, seeks the intervention of the government where it takes policy decisions to lead a direct impact. Hence the only righteous option that establishes the active role of the citizens in the United States is elections.  

Learn More:

Learn more about the Bill of Rights: ;  

(Answered by MrDonovan )

Learn more about the importance of voting: ;

(Answered by User )

Keywords:

Voting rights in United States, roles and responsibilities of the citizens in the United States,  

answergeosphere;

i'm sure the answer you are looking for would be

a. an ice age

hope this contact me if this didn't or you need with more answers : )