In Act 4 of The Crucible, Abigail Williams goes after Elizabeth Proctor, John Proctor's wife, largely out of jealousy and a desire to eliminate her as a rival. Abigail has had an affair with John and wishes to be with him, believing that with Elizabeth out of the picture, she can achieve her goal. Additionally, Abigail manipulates the situation to further her own interests and escape the consequences of her actions.
None of the options provided directly align with the motivations portrayed in the play. The most accurate reasoning for Abigail's actions would center around her obsession with John Proctor and her desire to remove Elizabeth in order to pursue a relationship with him, as well as her willingness to use the witch trials to her advantage.