The correct answer is option B -<u><em>Civil liberties</em></u>-. Because they are the limitations of the power government. Freedom from arbitrary governmental interference, specifically by denial of governmental power and in the U.S. especially as guaranteed by the Bill of Rights. The term is usually used in the plural.
Civil rights guarantee equal social opportunities and equal protection under the law. It protects the freedom and rights of individuals.
Precedents are previous events that are regarded as an example in subsequent similar situations.
Executive orders are rules issued by the President. And these orders are law.