Answer:
The correct option is six years.
Further Explanation:
The Upper house of the US Congress is called the Senate. Chosen Members of the Senate get to serve for the period of six years. and one-third seats of the Senate go in an election every two years. According to the Section 3 of the Constitution of the US, Two senators will represent each state and they will be appointed by the state legislatures but after ratification was done in the seventeenth amendment of the US Constitution, Senates were then elected by a direct election.
A person who is willing to fight for the post of Senate must pass three qualifications first. The person standing for the election of a Senator must be at least 30 years in age. Second, he/she should be a citizen of the United States or should be living in the US for the last 9 years and the last requirement is that if that person is once elected as a senator of that state that He/She should be inhabitant of that state.