Kelley Went Ice Skating on a Neighbor's Pond,but She Fell

Kelley went ice skating on a neighbor's pond,but she fell through a thin area into icy waters.Kelley did not have permission to be on the property,and the neighbor did not even know that she was there.Is the neighbor liable for Kelley's injuries?

A) Yes. The neighbor should have posted "thin ice" notices.
B) No. Kelley was a trespasser and the neighbor could only be held liable for intentionally injuring her or for gross misconduct.
C) It may depend on Kelley's age.
D) Yes, the neighbor is strictly liable.