One day while out for a walk, Rita saw a swimmer out in the lake, thrashing about and shouting for help. Rita pretended that she did not hear swimmer, even though Rita was an excellent swimmer, and could easily have swim out to help swimmer. Luckily a passing boat was able to rescue swimmer, but only after swimmer had ingested a significant amount of water into his lungs, causing personal injuries. Rita could easily have reached swimmer, and brought him to shore, before swimmer invested any water. What duty of care did Rita oh, swimmer? A) a duty of reasonable care B) no duty C) no duty, but only because the passing boat was nearby D) A duty to try extraordinary measures to help save swimmer