X Is the Owner of a Domesticated Dog

X is the owner of a domesticated dog. He left it at his compound while at work. Y, a neighbor threw stone at the dog, trying to play with it as he used to do. The dog was hit, hence, it jumped from the compound of X and went after Y who got injured when he fell while running away from the dog. Is X liable for damages?

A) X is liable as owner/possessor of the dog.
B) X is not liable because of force majeure.
C) X is not liable because of Y's fault for throwing stones at the dog.
D) X is liable but the court will temper the award of damages due to contributory negligence of Y.