Which body of government is least susceptible to public opinion polls?
the president
u. s. senate
u. s. house of representatives
u. s. supreme court

Option D.

Explanation:

U.S. Supreme Court, is the right answer.

The Supreme Court is the highest tribunal in the national judiciary of the U.S. The Supreme Court of the United States was established by Article III of the Constitution of the United States. It has primary authority over a restricted variety of matters, such as lawsuits between two or more states and such involving ambassadors. This is the only body that is least susceptible to public opinion polls.

i would say b. research typically uses a variety of sources