Mark the letter A, B, C, or D on your answer sheet to indicate the correct arrangement of the sentences to make a meaningful paragraph/letter in each of the following questions.

a. In the future, most of the world's population will be city dwellers.

b. Urbanisation is the process of increasing the number of people living in cities.

c. This is because urbanisation continues to transform the global landscape.

d. It began in ancient times but has only been happening on a large scale for about 200 years.

e. During the 20th century, the world's city dwellers grew from about 220 million to over 2 billion.