Final answer:
The skill that is not a critical skill of forensic accountants is Prosecution Ability.
Step-by-step explanation:
The skill that is not a critical skill of forensic accountants is C. Prosecution Ability. Forensic accountants primarily focus on investigating financial crimes and providing financial evidence in legal proceedings. While communication, critical thinking, reasoning ability, and problem-solving are all essential skills for forensic accountants, the ability to prosecute is not typically within their scope of responsibilities.