Which of the following judges did not serve during peace time?

Abdon

Jephthah

Tola

Elon

Abdon, was the son of Hillel, a Pirathonite, and was the twelfth JUDGE Judge of Israel mentioned in the Book of Judges.

Jephthah served as a judge over Israel for six years following the leadership of Jair.

Tola the seventh 7th Judge of Israel, Tola was from the tribe of Issachar. He ruled for 23 years 1149BC-1129BC.

Tola seems to have been raised to the position of Judge by God.

Elon, which also appeared as Ahialon in other translations, was one of the judges in the land of Israel. His name was of Hebrew origin, which meant "strong" or "oak". In Latin, he was referred to as Ahialon. This judge served in Israel after Ibzan, and his successor was Abdon. According to the Book of Judges 12:11, Elon came from the Tribe of Zebulun. He also became a judge for a period of ten years.

So all of them were judges in the bible during peace time, so I do not get why they would ask this question.