Final answer:
An informant is typically anyone who provides information to law enforcement, not specifically associated with having a criminal record, receiving payment, or being undercover officers.
Step-by-step explanation:
The typical definition of an informant is a person who provides information of an investigative nature to law enforcement. Therefore, the correct answer to the question on which person falls under the typical definition of an informant is a. Anyone who provides information of an investigative nature to law enforcement. An informant can come from various backgrounds; they do not necessarily need to have a criminal record or be paid for their information, and they are distinct from law enforcement officers working undercover.