Given the question: Write a multi-choice question for the following article, with the given choices and answer: Article: A concert under the theme of the 28-year-old charity song Let the World Be Filled with Love is set to bring 100 celebrated singers to perform in Quanzhou in southeast China's Fujian Province next month. The concert is set to cover 10 cities including Beijing. Quanzhou is the first stop of the touring schedule. The song Let the World Be Filled with Love was written by famous Chinese singer and songwriter Guo Feng. It was performed by a chorus of 100 singers during a concert for world peace that year. The song also made Guo Feng famous. The concert is organized by China TV Artists Association. It aims to improve local charity programmes. The concert has so far received positive feedback from some of the biggest names from the Chinese mainland, Hong Kong and Taiwan, including Hollywood actor Jackie Chan. It is well known that Jackie Chan has made great contributions to the music scene for years with songs like A Hero Never Dies and Don't Go Home. He sang the theme song to the film Fairy Tale with Kim Hee Sun. Between shooting films and joining in public activities all over the world, it took Chan about a year to finish an album. By joining in charity activities, Jackie Chan has provided scholarships for needy students and helped injured performers and their families. So far, he has been involved in over 100 public welfare projects in 52 cities in over 30 countries. Options: A About half a year. B About one year. C About one and half a year. D About two years. Answer: B About one year. Question:
The answer is:
How long did it take Jackie Chan to finish an album?