单选题

Copyright

Reproduction, the oldest and most common of the copyright rights, is consistently defined in the market countries of the West. For example, the German statute defines it as the "right to make copies of a work, irrespective of the method of number"; the British Copyright Act refers to "reproducing the work in any material form"; the French Copyright Law defines a work re production as "the material fixation of a work by any method that (21) ... indirect communication to the public"; and the U. S Copyright Act refers merely to the making of "copies".
In socialist countries, although a copyright does (22) ... the fight of reproduction, the fight can be exercised effectively only by state (23) ... As a consequence, (24) ... holders have to assign their rights to an agency—commonly their employer—and hope that the agency will (25) ... their copyrighted work.
Of course, the development of the Internet and the World Wide Web in the past 15 years has totally changed the ease with which copyrighted works may be (26) ... It is now possible— though not necessarily (27) ... —to instantly send a perfect copy of a work of art, music, literature, or software to millions of people around the world with the click of a (28) ... The rapid developments in (29) ... have made enforcement of copyrights law much more (30) and business firms have been struggling to protect their intellectual property in this new age.