Under Which of the Following Situations Does the Tort of Trespass

Under which of the following situations does the tort of trespass to realty occur?

A) When a person causes an object to be placed on the land of another without the landowner's permission.
B) When a person stays on the land of another when the owner tells him to depart.
C) When a person refuses to remove something he placed on the property that the owner of the property asked him remove.
D) When a person causes an object to be placed on the land of another without the landowner's permission, when a person stays on the land of another when the owner tells him to depart, and when a person refuses to remove something he placed on the property that the owner of the property asked him remove.
E) None of these because a person does not commit trespass to realty unless it can be established that the person initially entered the land of another without permission.