阅读理解 Many people hope that the whole world wil one day speak a common language . Over the years , people have made up new languages with this aim .(72) At least six hundred languages have been developed in the search for a language which al human beings would be able to speak . The most famous one , Esperanto (世界语), was the idea of Ludwig Zamenhof , a doctor in Warsaw . He publshed a book about hls new language in 1887. To encourage people to learn the language , he made it as simple as possible . Esperanto has never been accepted as an official world language , but it has been suggested as an auxiliary language . By 1950 it had been taught to one and a half million speakers , and it was spoken in six hundred schools . Today Esperanto is spoken by about elght milion people , and more than one hundred neWspapers and magazlnes In the language are published regularly throughout the world . Thousands of books have been written in Esperanto , including those translated from other languages . Today the need for a new auxiliary language like Esperanto seems less obvious .(73) Throughout this century English has grown more and more important . It has become a second language for many milions of people . The fact that more are learnlng English shows that the use of English ls still growing worldwide . No one would deny the usefulness of a world language , but not many people think that Esperanto is likely to play such a role .(单选题) Over the years , people have made up new languages in the hope that ().
选项：

A: all people will be able to speak a l common language
B: people will learn a foreign language better
C: people can understand each other better
D: people will be able to speak several languages