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Another word for "purge" is to cleanse, or make right. So, your answer will be C.
verb [ with obj. ]
rid (someone) of an unwanted feeling, memory, or condition, typically giving a sense of cathartic release: Bob had helped purge Martha of the terrible guilt that had haunted her.
• free someone from (an unwanted feeling, memory, or condition).
• remove (a group of people considered undesirable) from an organization or place in an abrupt or violent manner: he purged all but 26 of the central committee members.
• remove a group of undesirable people from (an organization or place) in an abrupt or violent way: an opportunity to purge the party of unsatisfactory members.
• Law atone for or wipe out (contempt of court).
• physically remove (something) completely: a cold air blower purges residual solvents from the body.
• [ no obj. ] (often as noun purging) evacuate one's bowels, especially as a result of taking a laxative.
an abrupt or violent removal of a group of people from an organization or place: a purge of the ruling class is absolutely necessary | a victim of the cultural purges.
• dated a laxative.
ORIGIN Middle English (in the legal sense ‘clear oneself of a charge’): from Old French purgier, from Latin purgare ‘purify,’ from purus ‘pure.’