If Numbers from the State-Run China National Network Information Center

If numbers from the state-run China National Network Information Center (CNNIC) are correct,China has more than 17 million Internet users as of June 2000.The Chinese government is filtering,tracing,and monitoring everything Chinese users do online as it looks for dissidents.Yahoo!,a U.S.Internet service provider,excludes correspondence related to human rights,democracy,or Tibetan freedom transmission to and from China so it will not lose its ability to operate in China.By self-regulating communication to and from China,Yahoo! is acting:

A) ethically but illegally.
B) ethically and legally.
C) unethically and illegally.
D) unethically but legally.