Given below are four sentences in jumbled order. Pick the option that gives their correct order.
A. These fields in the countryside have often been treated with pesticides which are harmful to bees.
B. There is a new buzz in towns and cities in Great Britain.
C. Bee-keepers living in the towns have begun to outnumber those in the country because plants growing in towns can offer more exciting nectar than fields in the countryside.
D. Bee-keeping, normally practised by people living in the country, has become a fashionable hobby for those who live and work in the cities.