Final answer:
The correct answer is A. Estoppel. Estoppel is a legal principle that prevents a person from asserting their rights if they have led another person to believe that they will not enforce those rights.
Step-by-step explanation:
The correct answer is A. Estoppel.
Estoppel is a legal principle that prevents a person from asserting their rights if they have led another person to believe that they will not enforce those rights. In this case, one is being stopped from reasserting their rights, which is an example of estoppel.
For example, if someone tells their neighbor that they will not enforce a property boundary dispute, and the neighbor relies on this statement by making improvements on the disputed land, the person who made the statement would be estopped from later claiming their rights to the disputed land.