单选题：Museums in the modern World Museums have changed．They are no

Museums in the modern World
Museums have changed．They are no longer places for the privileged few or for bored vacationers to Visit on rainy days． Action and democracy are words used in descriptions of museums now．
At a science museum in ontario，Canada，you can feel your hair stand on end as harmless electricity passes through your body．At the Metropolitan Museum of Art in New York City，yon can put at 17th century instruments while listening to their music．At the Modern Museum in Sweden，yon can put on costumes provided by the Stockholm 0pera． As these examples show，museums are reaching out to new audiences，particularly the young，the poor，and the 1ess educated members of the population．As a result，attendance is increasing．
More and more，museums directors are realizing that people learn best when they can somehow become part of what they are seeing． In many science museums，for example，there are no guided tours． The visitor is encouraged to touch，listen，operate，and experiment so as to discover scientific principles for himself． He earl have the experience of operating a spaceship or a computer． He Can experiment with glass blowing and papermaking． The purpose．is not only to provide fun hut also to help people feel at home in the world of science． The theory is that people who do not understand science will probably fear it，and those who fear science will not use it to the hest advantage． Many museums now provide educational services and children’s departments． In addition to the usual displays，they also offer film showings and dance programs． Instead 0f being places that one should visit， they are places to enjoy．
0ne cause of all these changes is the increase in wealth and leisure time． Another cause is the rising percentage of young population． Many of these young people are college students or college graduates，they are better educated than their parents． They see things in a new and different way．
They are not content to stand and look at works of art；they want art they can participate in．The same is true of science and history．In the US．，certain groups who formerly were too poor to care about anything beyond the basic needs of daily life are now becoming curious about the world around them．
The young people in these groups，like young people in general，have benefited from a better education than their parents received．All these groups，and the rest of the population as well，have been influenced by television，which has taughf them about places and other times．
The effect of a11 this has been to change existing museums and to encourage the building of new ones． In the US．and Canada alone，there are now more than 6，000 museums，almost twice as many as there were 25 years ago． About half of them are devoted to history，and the rest are evenly divided&