A bite of wisdom

Which of these verbs means to atone for something?

Expire

Expatriate

Expiate

Expel

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expiate

1. atone for (guilt or sin)

"their sins must be expiated by sacrifice"

Choice "A": Expire % of users selected this choice.
Choice "B": Expatriate % of users selected this choice.
Choice "C": Expiate % of users selected this choice.
Choice "D": Expel % of users selected this choice.