[单项选择]

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In April 1995, a young Chinese chemistry student at Beijing University lay dying in a Beijing hospital. She was in a coma, and although her doctors had performed numerous tests, they could not discover what was killing her. In desperation, a student friend posted an SOS describing her symptoms to several medical bulletin boards and mailing lists on the Intermet. Around the world, doctors who regularly checked these electronic bulletin boards and lists responded immediately.
In Washington D. C., Do, John Aldis, a physician with the U.S. Department of State, saw the message from China. Using the Internet, he forwarded the message to colleagues in America. Soon an international group of doctors joined the e-mail discussion. A diagnosis emerged -- the woman might have been poisoned with thallium, a metal resembling lead. A Beijing laboratory confirmed this diagnosis -- the thallium concentration in her body was a
A. It is optical fibers and lasers that have made the information superhighway possible.
B. People can communicate with each other more quickly now on the Internet.
C. It has taken quite a long time for the Internet to come into existence.
D. If one is seriously ill, he can always get help via the modern communication system.