Расшифровка записи

Dialogue A.
A: We heat the water and when its temperature reaches 100 degrees, it starts to boil.
B: Excuse me, Mrs. Brown, can the temperature of the water get higher than that if we keep increasing the heat?
A: No. At least not under normal conditions. At 100 degrees water changes into steam.
B: It’s just what happens when we boil water in a kettle, isn’t it?
A: Exactly.

Dialogue B.
A: It looks very good. And it fits you perfectly.
B: But I don’t need it! Who buys a warm coat in the summer, when the temperature never drops below 15 degrees!
A: But the winter comes every year anyway. And when it comes, this coat will cost double the price. We’re buying it now!
B: Ok, whatever you want…

Dialogue C.
A: When did you say you first felt unwell?
B: In the morning. I woke up and started to cough. And I have a sore throat.
A: Ok, my assistant will take your temperature, and then I’ll examine you. Could you take that seat please?
B: OK, thank you.

Dialogue D.
A: They’ve got a wonderful collection of old books and manuscripts.
B: Yes. Look, this book dates from the 18th century! The pages are yellowish.
A: There are even older books here. I think it must be difficult to take care of such delicate exhibits.
B: Yes. Low and high temperatures, as well as sunshine and humidity, are very harmful to them.
A: Have a look at this one. Can you read the name of the author on that one?

Пояснение . Исходя из текста, единственный верный ответ под номером 2.

Ответ: 2.