Stan doesn't like having neighborhood teenagers walk across his yard at night. He rigs an animal trap on the path the teenagers usually use to cross his land. One night, Tim and his friends are walking across the yard when Tim gets caught in the trap. He is taken to the hospital for his injuries. Stan:

a. has the right to strongly discourage anyone from trespassing, and Tim was a trespasser.b. has no duty toward Tim.c. is not free to inflict intentional injury on a trespasser.d. All of these.