Which of the following are true statements? (Check all that apply.) A. Virtually all calls to fraud hotlines are worthy of investigation. B. Fraudsters follow distinct patterns and leave clues behind that can be discovered by fraud detection software. C. Neural networks and other programs with learning capabilities are still not able to accurately identify fraud. D. Some whistle-blowers have been ostracized, persecuted, or suffered damage to their careers. E. People witnessing fraudulent behavior are eager and willing to report fraud perpetrators.