A Guangdong fisherman caught a whale shark that weighed around 1,500 kilograms and released it back to the sea. The fisherman, surnamed Xu, said it is the biggest fish he has ever caught and locals have a custom of releasing big fish to the wild. The species is the world's largest known fish and was listed as a protected species by an international convention. The average size of an adult whale shark is estimated to be 9.7 meters and 9 tons.

How long is the freed whale shark?

A. 1,500 centimeters

B. 9.7 meters

C. The article didn't say.

（中國日報網英語點津 Helen 編輯）