Shawn is backpacking across the country. Suddenly a dangerous storm approaches. Shawn sees a house nearby. No one is home. He enters the house, causing it no damage. As soon as the storm clears, Shawn leaves. What tort has Shawn committed and if there is an applicable defense, what is it? trespass to land necessity trespass to chattels duress trespass to chattels necessity O trespass to chattels trespass to land trespass to land none duress none