The correct answer is (B) To repent; to make amends for a sin, wrong, or omission, or reparation for a crime or offense. To make up, as for errors or deficiencies..

Atone comes from Middle English atonen (to reconcile).

Examples of use:

• His religion requires that he atone for his failings.
• Someday, they will have to atone for their misdeeds.