单项选择题

For a small island Great Britain has a great length of coastline, and there is no place in the whole country which is more than three hours’ journey by car from the sea. The coast is very varied, with perhaps the best parts in the southwest of England and in the west of Scotland. The coast of Devon and Cornwall, in the south-west, is much indented (向内陆凹进), with many sheltered bays and fine rough points of land extending out into the sea. With so large a population on so small an island the best parts of the coast are inevitably rather crowded during the summer, but much of Devon and Cornwall is still unspoiled, with many picturesque (风景如画的) fishing villages. The other parts of the coast are less dramatic, being partly fiat and partly steep.
In the parts nearest to great centres of population big seaside-resort (海淀胜地) towns have grown up. Four of these, Brighton, Bournemouth and Southend in the south, and Blackpool in the north-west, have become important towns themselves, with more than 150, 000 permanent residents each, and there are other big seaside towns whose inhabitants include many retired people. Some of these places are remarkable for the great number of visitors they receive, some to stay for a week or a fortnight, some to spend a few hours on the beach before returning home in the evening.

How long do the visitors stay in a seaside resort()

A. From several hours to two weeks.
B. Usually less than a day.
C. From a few days to two months.
D. Seldom more than a week.