OPTIONS: I. Three.. II. Four.. III. Five.. IV. Six..
Given those answer options, answer the question: Read the following article and answer the question. Article: Dou Kou, a Chinese boy, is called "the youngest writer in the world". He has written three books till now. Dou Kou was born in Jiangsu in 1994. When he was 7 months old, his parents started working in over 30 different cities, such as Xi'an and Shenzhen. This kind of life gave him things to think and write about. When he was 9 months old, he could speak and at the age of one, he could say five to six hundred words. At three, he could look up words in the dictionary. At four, his father taught him how to learn by himself. His parents like reading very much. So does he . At the age of 5, he began writing fairy tales. At the age of 6, he wrote a novel about his life in different cities with his parents. His fairy tales are all from his life. One day, he found many mice in the house. They not only ate their food but also hurt his mother's hand. So he thought, "If we give mice the stomach of cows, _ will eat grass and they will be helpful to people." This was his first fairy tale Change stomach for Mice. Now he studies well in a middle school. He has written his third book, the novel called Eyes of Children. He says, "I am not different from other children. I just wrote several books." Question: How many books has Dou Kou written? Answer:
A:
I.