this wuestion is regarding business law for accountant

Lisa and Christina own homes on properties next to each other. There was no visible boundary between the properties. Neither remembered where the property division was. Christina noticed a diseased tree in between the properties. She said to Lisa, the tree is on your land. If it causes any harm to my property, I will sue you. Youd better cut it down before it causes damage to my home. This alarmed Lisa and she immediately hired a company to cut down the tree and thus removed the afternoon shade to Christinas home. Later, it was shown that the tree was in fact on Christinas land (not Lisas). Christina is enraged and sues for damages. Which of the following is correct?

Question 11 options:

Christina cannot be successful because of Chronological Estoppel

As Lisa did not know it was on Christinas land, she cannot be found liable

Lisa is liable due to the principal of Bagosian Equitable Estoppel

Lisa can claim Promissory Estoppel