Answer:
It provides evidence that Abigail will lie to get out of trouble.
Step-by-step explanation:
The text shown above shows how Abigail actually became involved in witchcraft, even participating in a spell and drinking blood to harm the proctor family and manipulate John Proctor into returning to her. However, Abigail is unwilling to confess this, because she knows that the punishment for messing with witchcraft and getting involved with a married man will be very serious. So she decides to lie, casting her as a victim and preventing people who know the truth from contradicting her. This shows how Abigail is underhanded and willing to lie to get out of trouble.
Abigail is a character in "The Crucible," a play that reproduces the full story and wave of accusations that occurred during the Salem witch trials.