Answer: Slander of title
Explanation:
Slander of title is a tort in which a third party or person tends to publish false and faulty statement about particular person's or party's property that impacts down grading that party's title and reputation.They might also suffer form financial loses.
According to the question,Cory has committed wrongful act of slander of title as they he has falsely published untrue information about Bling jewels which has decreased their sales and disparaged them.