Article II of the ACFE Code of Professional Ethics prohibits illegal or unethical conduct, but...

 ACFE Code of Professional Ethics:

Article II prohibits all illegal and unethical conduct, with no exceptions for unknowing violations of the law. CFEs are expected to maintain a high standard of professional integrity and responsibility.

 Why B is Correct:

Ignorance of the law is not an acceptable defense under the ACFE Code of Ethics. Professionals must ensure they understand and comply with applicable laws.

 References:

ACFE Code of Professional Ethics​​.