单选题：Questions are based on the following passage.　　Because of

Questions are based on the following passage.
　　Because of satellite links which now enable broadcast news organizations to originate liveprogramming from any part of the globe, the entire world is becoming one giant sound stage fortelevision news. As a result, Shakespeare's famous line, "all the worh is a stage," has taken on aninteresting new twist in meaning.
　　Even before today's worldwide satellite links were possible, the growing effect of broadcast news
　　technology on national and international politics was becoming increasingly evident.
　　Because television is a close-up medium and a medium that seerns to most readily involve
　　emotions, it is most effective when it is revealing the plights of people; During the Vietnam War, readingabout war was one thing, but war took on a deeper and more unsavor' ( 令人讨厌的) dimension when 　　it was exported directly into U. S. living rooms night after night by television. Public opinion eventuallyturned against the war and to some measure against President Johnson who was associated with it. As
　　a result of the public opinion backlash (消极反应) during these tines, the Pentagon was thereaftermuch more careful to control what foreign correspondents and TV crews would be allowed to see andreport.
　　It was during this time that President Carter brought the issue of human rights to the centre of hisforeign policy, and, to some degree, to the centre of international pol tics. "Human rights is the soul ofour foreign policy," Carter said. "Of all human rights the most basic s to be free of arbitrary violence,whether that violence comes from government, from terrorists, from criminals, or fi'om self-appointedmessiahs (救世主) operating under the cover of politics or religion. "
　　Although political viewpoints have changed since then, because of the emotional nature of humanrights, this has emerged as the "soul" of television news. The transgression (侵犯) of human rightshas been the focus of many, if not most, major international television news stories. The reporting ofthese stories has created outrage in the world, prompted attempts at censorship by dictators, and in many
　　cases resulted in the elimination of human rights abuses.

The passage mainly discusses____________. A．the evolution of international politics in the United States
B．the broadcast media gives its primary concern on human rights
C．the global television communication has a huge impact on pet,pie's emotions
D．the broadcast media plays a growing role in international poli ics