In the Alberta Court of Queen's Bench Decision in Costello

In the Alberta Court of Queen's Bench decision in Costello v.Calgary (City) ,the Court held that a trespass occurs if

A) an authority takes possession of land without exercising good intentions.
B) an authority enters onto land pursuant to a court order.
C) an authority takes possession of land pursuant to an expropriation that is subsequently determined to be invalid.
D) an authority enters onto land with the consent of the owner.
E) an authority enters onto land pursuant to an intra vires legislative enactment.