阅读下列短文，然后从每小题A、B、C、D四个选项中选出能回答所提问题或完成所给句子的最佳答案。
In 2015, on a TV show I Am a Singer 3, Li Jian became the most popular one, because he has great singing ability and sense of humor. Li has a smooth voice. His songs can really touch the listeners. People even give him the nickname "Poetic Musician" because of his poetic lyrics.
Li was born in Harbin in 1974. He showed great talent for music from an early age. He learned to play the guitar by himself. Later, he became a good guitarist and won the first prize in a national competition. “In my younger days, guitar was like my best friend." Li said.
Though he studied electronic engineering in Qinghua University, he never gave up music. Then in March 2001, Li formed a group called Shuimu Nianhua with his friend. Later, Li didn't agree to change their musical style. So the pair went their separate（分离）ways next year.
Unlike some other musicians, Li does very few interviews or concerts. He spends more time writing songs. "Writing songs is like collecting water in a cup. When the cup is full, the water will come out naturally." he said.
利之辨不仅是保住人格的一道防线