In this task, you will be presented with a question having multiple possible answers in Chinese language. And you should choose a most suitable option out of "A", "B", "C", "D", and "E" based on your commonsense knowledge.

Question: 他苦心经营的剑术为他提供了什么？ 
 Options: A 灵巧 B 竞争 C 剑 D 保护 E 肥胖症 
D