SEOUL, South Korea — The Korean Air Lines Co. executive who delayed a flight in an incident dubbed "nut rage" bowed deep in apology before facing questioning by transport officials. Her father, the airline's chairman, also apologized Friday, said she will quit the airline and expressed regret he didn't raise her better. The apologies came in response to simmering public anger about the incident and the airline's handling of it. Cho Hyun-ah, who was head of cabin service at Korean Air, was angered when a flight attendant in first class offered her…