单项选择题
W：Well，it’s sort of attractive，but in the end I still find it a pretty depressing place.
M：Do you？Why？
W：The animals are out of their natural environment.They’re just here for humans to look at.There’s nothing natural about it.
M：Yeah，but if we didn’t have any zoos，a lot of species would just，well，they’d face extinction.
W：Do you really believe that？
M：Well，don’t you？I mean they have good breeding projects for some species that are dying out.Um，anyway，I think，there’s a trend towards developing zoos to become education centers，stimulating information for kids and displays，and that kind of thing.
W：What we need to do is to take care of the natural environment，make sure that they’ve still got a place where they can live in the wild.
M：Well，yeah，OK.But it’s just not happening，is it？I think in reality you’ve got to have zoos.
W：Well，I just can’t agree with that.I mean，what is the pleasure in watching animals pacing up and down in cages？
M：Look，zoos are changing.Some older zoos put animals in cages，but what about safari parks？The animals are fine there.They’ve got a lot of space and people see them in a much more natural setting.
W：Well，maybe you’re right.
A．About the building of the zoo.
B．About the lay-out of the zoo.
C．About the function of the zoo.
D．About the attractiveness of the zoo.