Susan Boyle was just an ordinary middle-aged British woman before she appeared on the reality show . She lives in a house with her cat Pebbles in a tiny Scottish town. Because of learning difficulties, she doesn't have much education. But what she does have is a very good voice. As a kid, she sang in church and school plays. For a living, she sang at local pubs. When she took the stage on April 10th, her hair was untidy and her clothes seemed _ rags .The audience laughed at her. But then she opened her mouth. A few bars into the song and the laughing audience went silent. A beautiful voice was singing I Dreamed a Dream from the musical Les Miserables. Everyone was amazed. At the end of the song, the audience jumped to their feet and applauded wildly. Almost overnight, Susan became a household name. She won fans and millions of admirers. Her online videos have drawn over 85.2 million hits. Susan's story proved the truth of an old saying: "Never judge a book by its cover." The audience jumped and applauded wildly because   _  .
her hair was untidy and her clothes seemed just one step up from rags she looks very funny she sang so well that everyone was amazed she made a foolish mistake in the end
Question: Susan Boyle was just an ordinary middle-aged British woman before she appeared on the reality show . She lives in a house with her cat Pebbles in a tiny Scottish town. Because of learning difficulties, she doesn't have much education. But what she does have is a very good voice. As a kid, she sang in church and school plays. For a living, she sang at local pubs. When she took the stage on April 10th, her hair was untidy and her clothes seemed _ rags .The audience laughed at her. But then she opened her mouth. A few bars into the song and the laughing audience went silent. A beautiful voice was singing I Dreamed a Dream from the musical Les Miserables. Everyone was amazed. At the end of the song, the audience jumped to their feet and applauded wildly. Almost overnight, Susan became a household name. She won fans and millions of admirers. Her online videos have drawn over 85.2 million hits. Susan's story proved the truth of an old saying: "Never judge a book by its cover." The audience jumped and applauded wildly because   _  .
A. her hair was untidy and her clothes seemed just one step up from rags
B. she looks very funny
C. she sang so well that everyone was amazed
D. she made a foolish mistake in the end
Answer: