27.Which of the following individuals can be considered a whistle-blower?
(A)Mr. Chao, who discovers evidence of malpractice in the organization he works for and chooses to report it
(B)Mr. Chien，who discovers evidence of malpractice in the organization he works for and chooses to ignore it
(C)Ms. Sun, who discovers and ignores the fact that her company's main competitor is doing something unethical
(D)Ms. Lee, who discovers and reports the fact that her company's main competitor is doing something unethical