The task of finding that one piece of information relevant to searcher’s specific problem is ______.

A．He thinks computer games might not always sell so well.
B．One has to be young to write computer programs.
C．He thinks his firm might close down.
D．Because his parents asked him to retire.

A．Different people have different ideas about the same thing.
B．Westerners do not like pigs as much as the Chinese.
C．In general, Westerners and the Chinese don’ t like pigs.
D．All of the Chinese like pigs better than Westerners.