Explanation:

- Option 1: Conviction

Conviction refers to a formal declaration by the legal system that someone is guilty of a crime. A history sheet based on convictions would rely on proven legal outcomes, not character interpretation.

- Option 2: Hearsay

Hearsay involves information received from other people that cannot be substantiated. It is often seen as unreliable and not a direct reflection of a person’s character.

- Option 3: Investigation

Investigation involves a thorough examination to determine the facts of a case. While investigations seek truth, they are not complete conclusions and often depend on the thoroughness and perspective of the investigators.

- Option 4: None of them

This option considers that none of the above factors govern how a person's history sheet is characterized. However, it doesn’t specifically address the question about hearsay's role.