Which of These Characterizations Best Describes How a Tit-For-Tat Strategy

Which of these characterizations best describes how a tit-for-tat strategy starts and what happens subsequently

A) initially conciliatory and then encourages an optimal social outcome among the other players
B) initially unfriendly and then encourages friendly strategies among players
C) initially friendly, then penalizes unfriendly players, and forgives them if warranted
D) initially aggressive, then compensates losing players, and eventually forgives unfriendly players