A、The heat supply. B、The electric supply. C、The water supply. D、The unemployment situation. D

M: Now, I’d like to say that I think that this government proposing to build more nuclear power stations in this country is really being stupid. The point about nuclear power is that we haven’ t learnt to do away with the waste. We haven’t learnt to cope with the waste from it yet.
W: Well, I sometimes think that, you know, they’ve got an impossible job. I mean all the impression I get is that there is no alternative.. . well, that’ s the impression I get.
M: No, no, no I. .. I don’t agree with that at all. There are plenty of alternatives. There’s the sun... solar power... that is a source that is always there, we always have it.
W: I don’ t... I don’t quite see what you’ re getting at actually, solar power, what’ s that?
M: Well, the heat from the sun, it can be used in solar panels on the tops of houses for heating, storing up power to heat water and to heat the houses, you know, some solar panels are in operation already and they are saving money...
W: That’ s a good point actually, but is it really viable, that, I mean because I’d...
M: Sorry it must be! And the one great advantage is that I can see, if the government set up small units to build solar panels and to install them, it would be creating employment which would improve the unemployment situation and bring terrific advantages.
W: I have heard that in England, I mean, there’s not enough sun, is there? For, I mean, solar panels here?
M: Yes, well, that’s not quite true. I... there is quite a bit of sun... you may not feel the actual heat of it on some occasions.
W: No, you are right there!
M: But the light power from the sun will...