Which of the following would be considered a reliable sign of deception?

A reliable sign of deception can often manifest through an over-eagerness to help. This behavior can indicate that an individual may be trying too hard to present themselves favorably or to sway perception in their favor. When someone is overly eager to assist, it might give the impression that they are attempting to conceal something or distract from the truth. This overcompensation can be a red flag, as it deviates from typical behavior expected during interactions, especially in environments where honesty and transparency are crucial.

In contrast, the other options reflect behaviors that typically suggest sincerity or comfort, such as clear articulation of thoughts, open and expressive body language, and a calm demeanor. These traits often indicate confidence and openness rather than deceit. Understanding these nuances can help in identifying truthful communication versus attempts to mislead or fabricate.