SI: Why do the English travel ? S6 : For here, in cosmopolitan England, one is always exposed to the danger of meeting all sorts of peculiar aliens. P : Besides, they are taught that travel broadens the mind. Q : They do so mainly because their neighbour does this and they have caught the bug from him. R : Although they have now discovered the sad truth that whatever travel may do to the mind, it certainly broadens other parts of the body. S : But, and perhaps mainly, they travel to avoid foreigners. The proper sequence should be
- AR S Q P
- BP R S Q
- CS Q P R
- DQ P R S
Explanation
Q directly answers S1's question 'Why do the English travel?' (mainly because their neighbour does). P adds a second reason (taught that travel broadens the mind). R contrasts with P through 'although' -- travel broadens other parts of the body instead. S ('but, and perhaps mainly, they travel to avoid foreigners') is the clinching reason, and S6 explains it: cosmopolitan England exposes one to the danger of meeting peculiar aliens. Hence QPRS, i.e. option D.