Our friend, Nick, declared the other day that he thought that the British climate was wonderful, but the British weather was terrible. He went on by pointing out that the British climate was a temperate (温和的) one. "This meant," he said, "that you could always be certain that the weather would never be extreme, at any rate not for any length of time, never very hot and never very cold." He quite rightly pointed out that the rainfall in Britain was not very heavy. "Why then," he asked, "has the British climate such a bad reputation (名声)?" He answered by saying it was because of the extraordinary (非凡的), unreliable weather. There was no part of the year at which you could be certain that the weather would be dry or wet, clear or dull, hot or cold. A bad day in July could be as cold as a mild day in January.
Indeed you could feel cold at almost any time of the year. Nick blamed drafty (通风的) British houses for this, but agreed that you could also blame the small amount of sunshine and a great amount of dampness. He admitted he had never experienced one of London's fogs. For the present he advised every student coming to Britain to bring an umbrella and to understand the meaning of that splendid word "drizzle.
It is supposed that British people like to talk about weather just because ______.

A.the weather is always the same at any particular period of time

B.the weather is extremely temperate in a whole

C.the weather is neither cold nor hot, neither sunny nor rainy

D.the weather is extremely changeable even in a day