One of the Disadvantages of Benford's Law in Detecting Fraud

One of the disadvantages of Benford's law in detecting fraud is:

A) potential suspects are more likely to know you are trying to detect fraud than if you use such detection techniques.
B) users must be thoroughly trained in its complexities to implement and use.
C) that those cases with the lowest probabilities do not match Benford's law and may need further investigation.
D) it only broadly identifies the possible existence of fraud; it fails to narrow possibilities to a manageable field of promising leads.