The u. s. constitution establishes six-year terms for members of the senate in order to: a. allow senators to focus on long-term national issues. b. make senators more responsive to public opinion. c. discourage senators from joining established political parties. d. encourage senators to propose more constitutional amendments.

The U.S. Constitution establishes six-year terms for members of the Senate in order to allow senators to focus on long-term national issues.

Option A

Explanation:

The six year tenure which was designed by the makers of the Constitution made senators more responsive to long term national issues and less responsive to short term political pressures. This is three times the tenure of the people of the House of Representatives.

One third of the members' tenure will expire in every two years, thus leaving them with not only a majority of members and along with continuity of the same, but with also a regular rotation of the members too.

you didn't list the options. however, a few communist countries today are: the people's republic of china, north korea, and cuba.