A、They may attack human beings in the farm. B、They caused abortion of farm animals. C、They destroyed the farm crops. D、They have

M: Thanks for coming over, Amy. (12) I’d like to talk to you about a research project I thought you might be interested in. A friend of mine is working in Iowa National Park this summer. W: A national park! I’ve always wanted to spend some time out in Iowa.
M: You’d better hear what project it is about first. My friend is working with the red fox population. The foxes have been increasing in size lately, which is good in theory.
W: Yeah, but I thought they were in danger of dying out.
M: (13) Because of the winter tourists, paths are created in the snow. More red foxes are surviving the harsh winters because the paths make it easier for the foxes to move around and find food. But it turns out that some of them are infected with bacteria.
W: Oh yeah, I heard about that. It’s been around for a while.
M: Yes. (14) And because the red fox population is increasing, they’ve been moving more than usual and need more food, they begin to hunt in the farm which borders the national park. As a result, the bacteria have spread to the neighboring farms.
W: That’s bad news. (14) Isn’t that a disease that causes animal abortion?
M: (14) Yes, and it’s caused a lot of controversy. Some of the farmers even want to destroy the red foxes.
W: That’s awful. Have they made much progress with the research?
M: So far, they have been collecting tissue samples from dead foxes to see if the bacteria are present.
W: I’d really be interested in working on this. (15) You know I’ve been researching diseased animal population.
M: (15) That’s why I thought of you.
　　12.  What is the man talking about with the woman?
　　13.  Why is the number of red foxes increasing?
　　14.  Why do some farmers want to kill red foxes?
　　15.  Why does the man consider the woman suitable for the project?