`S_(1)` : Some people prefer country life of city life.
`S_(6)` : For theses reasons li more and more people are leaving the country to live in the city.
P : Country people live longer and gererally seem to be healthier and happier.
Q : And a chance to meet more nd more people.
R : Life in the country is quieter, cleaner and less hectice.
S : However the city offers more excitement and job opportunities .
The proper squence should be
A. P-R-Q-S
B. R-P-Q-S
C. P-Q-R-S
D. R-P-S-Q
