The White-Collar Crime chapter summarizes ACFE research on occupational fraud perpetrators. In the section addressing perpetrators' criminal backgrounds, the manual states that the vast majority of occupational fraudsters have no prior history of criminal fraud convictions and notes that only a small percentage had previously been convicted of a fraud-related offense. It concludes from these findings that most occupational fraudsters are first-time offenders. The manual also explains elsewhere that owners and executives tend to cause much larger median losses than lower-level employees, which eliminates option D. Because the question asks which statement is true according to ACFE research, the best answer is that most employees who commit occupational fraud are first-time offenders. This is a recurring finding in ACFE studies cited by the manual.

A behavioral nudge is designed to influence behavior without removing a person's freedom to choose. In fraud prevention, nudges can encourage ethical conduct, proper reporting, or compliance by making the desired behavior easier or more natural, while still preserving employee autonomy. Option A is therefore the most accurate. Training content about proper document disposal is education, not necessarily a behavioral nudge. Option C incorrectly describes the distinction between nudges and reminders. Option D is incorrect because removing all other choices would be a rule, mandate, or control, not a nudge. The CFE Fraud Prevention and Deterrence materials emphasize using behavior-focused prevention techniques to reduce misconduct, but the employee must still retain the final decision or action. Therefore, option A is correct.

The White-Collar Crime discussion on organizational structure explains that structural characteristics can affect how likely wrongdoing is to occur and remain undetected. In simple organizations with fewer specialized departments and less differentiation, there are generally fewer independent checks, fewer distinct perspectives, and less separation among functions. This can make it easier for misconduct to remain hidden because fewer people are positioned to identify irregularities or challenge suspicious activity. By contrast, greater specialization can sometimes make concealment more difficult because unusual conduct may be more visible to those with relevant expertise. The manual also repeatedly links effective controls and oversight to fraud detection. Consistent with that reasoning, a simple structure with few specialized departments can increase the likelihood that fraud will go undetected. Therefore, the statement is true.

Management is ultimately responsible for setting the organization's ethical tone. This concept is commonly called "tone at the top." A strong anti-fraud culture depends on management demonstrating, communicating, and enforcing ethical expectations consistently. Fraud examiners can investigate allegations and advise on controls, but they do not set the organization's culture. General counsel can advise on legal obligations, and human resources can help administer policies, discipline, and training, but neither replaces management's responsibility for ethical leadership. Employees observe whether senior leaders follow the same standards they impose on others. If management tolerates misconduct, applies rules inconsistently, or ignores warning signs, the fraud prevention program becomes less effective. Therefore, the party ultimately responsible for setting and reinforcing ethical tone is management, making option D correct.