Which of the following could potentially lead to rejection of a private investigator application?

Providing incomplete information in a private investigator application can significantly impact the assessment of the applicant's suitability for the role. Licensing authorities require comprehensive details to conduct thorough background checks and ensure that the applicant meets all necessary qualifications and standards for the profession. Incomplete applications may raise red flags, inhibit the ability to verify credentials, and ultimately lead to the rejection of the application. Therefore, ensuring that all requested information is accurately and fully provided is critical in securing a license to operate as a private investigator.

The other choices do not present barriers to application acceptance. A clean criminal record is generally seen as a positive attribute, and successfully passing all required exams demonstrates proficiency and readiness for the responsibilities of a private investigator. Additionally, the option stating "none of the above" implies that there are no valid reasons for rejection, which is not applicable in this context.