【单选题】

After their owners (主人) left them carelessly behind in Yellowstone National Park, Louie, a 4-year-old golden dog, and Nipsy, a 3-year-old long hair eat, were killed within minutes of beginning their journey home. Repons said "It looks like right after leaving the campsite they were chased (追逐) by some big animals. So they ran quickly and fell off a cliff (悬崖) in a hurry and dieD、" The park keeper Ken Hinkley said he discovered their bodies, part of which had been eaten by a wolf possibly when he was looking around the park.And it seemed that their bodies were run over by a truck after that.

Their owners were very sad to learn the news, but they had to give up hope.
A、few months later, they bought a new kitten and puppy whom they love very much. They said they would look after the dog and cat carefully this time.
How did they die
A、They were killed by some big animals.
B．They fell off the cliff carelessly and dieD、
C．They were eaten by a wolf.