Alegal example which must be followed in all similar cases in the future is called

a
precedent

b
writ of certiorari

c
judicial review

A is the correct answer.

In a common law system, such as the United States, judges rely on precedent or rulings in cases with facts similar to that of the current case to guide their decision making.

a social contract.

"a social contract is an agreement between citizens and their leader where the citizens give up certain freedoms in exchange for protection. the constitution of the united states is an example of a social contract."