Mark the letter A, B, C or D on your answer sheet to indicate the best arrangement of utterances or sentences to make a meaningful exchange or text in each of the following questions from 1 to 5.

a. He walked through the streets, recalling childhood memories and sensing the continuous development of his hometown.
b. His hometown had changed a lot, with the green fields now replaced by modern high-rise buildings.
c. Even with all the changes, Mark's love for his hometown remained unwavering.
d. When Mark returned to his hometown after many years away, he felt both happy and nostalgic.
e. Despite this, Mark still recognized the familiar people, who retained the kind and simple nature of the countryside.