In an Adversarial Legal System

In an adversarial legal system,

A) legal precedent plays an unimportant role.
B) judges take an active role in questioning witnesses to seek and discover the truth.
C) the primary goal of the legal process is to protect civil liberties.
D) attorneys are expected to provide zealous representation and advocacy to protect their side's interests.
E) the defense's responsibility is to prove their client's innocence.