Final answer:
Option b is correct, stating that undercover operations should only be used if there is sufficient probable cause that a crime has been committed, ensuring they are legal and ethical.
Step-by-step explanation:
Regarding the use of undercover operations in fraud examinations, the true statement is that such operations should only be utilized if there is sufficient probable cause that a crime has been committed. Option b is correct as undercover operations are indeed legal under certain conditions but are bound by legal and ethical guidelines to ensure that they respect the rights of individuals and adhere to the rule of law. While undercover work is a valuable tool in detecting, investigating, and preventing fraud, it must be conducted with due diligence and within the parameters of the law. Undercover investigators must adhere to regulations to avoid entrapment or other legal violations.