Which of the Following Is an Example of the Principle

Which of the following is an example of the principle of Battered Woman Syndrome?

A) Helen was a battered woman in a violent common-law relationship. After another fight in which her partner beats her, he threatens to kill her after their guests leave the house. As he leaves the room, Helen shoots him in the back of the head.
B) Betty and her husband rarely disagree and have never fought. One night he slaps her during a minor disagreement. She can't remember what happens next, but the next thing she knows, she's in handcuffs, and her husband is lying dead in the living room with dozens of stab wounds.
C) Mariel dated Steve for a few months, but broke up with him after he slapped her. Several years later she sees him at the market. She follows him home, and shoots him at his front door.
D) Angelique and her brother have always had a bad relationship. After their mother's funeral they argue about who will get the family heirlooms. Angelique is fed up with his years of tormenting her, and stabs him once in the leg. She hits an artery, and her brother bleeds to death before paramedics can arrive.