The treatment of unauthorised immigrants by many countries is often cruel and lacking in compassion. Even refugees from war-torn or famine-stricken regions can find themselves imprisoned on arrival or deported back to the place they have fled. It is a terrible decision to have to take, but if we make an exception to the law for one person, we ought to make the same exception for everyone. If some illegal entrants were allowed to stay, others would have to be treated equally, and no country - especially one that is already overpopulated - could physically accommodate the numbers that would then follow. The regulations have to be enforced rigidly, even if this means turning away people in great need. Which of the following best illustrates the principle underlying the argument above?
A.
Because of fire regulations, the number of people attending the concert will have to be strictly limited.
B.
Growing urban traffic congestion means that in the future the numbers of cars entering some city centres will have to be restricted.
C.
All shop-lifters must be prosecuted because if one is let off others would rightly expect the same leniency.
D.
There is no one rule that can be applied for all prisoners seeking parole: every case is different and should be decided on its merits.
E.
If there are not enough hospital places for all those who need them, the most urgent ones must be treated first even if others have waited a long time.