Question: Write a multi-choice question for the following article: Article: In Japan, Luffy is more popular than Harry Potter.Luffy is the main _ of One Piece .The book came out in 1997. One Piece tells the adventures of Monkey D.Luffy, a 17-year-old boy.He gets supernatural abilities by eating fruit.Luffy's dream is to find the world's biggest treasure, One Piece.Then he wants to become the next Pirate King. To make his dream come true, Luffy has to reach the end of the most dangerous ocean: the Grand Line.Luffy travels with a group of pirates called the Straw Hats.On his way, more people join the group.It even includes a cook, a soldier and a musician.They also help Luffy fight with other pirates on the way. Many Chinese teenagers are One Piece fans.Yang Peiqi, 14, of Shenzhen, says he thinks reading One Piece is great fun and also he likes the themes of the story-dreams and friends.
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Question: What are the themes of One Piece?Options:A Treasure and money.B Study and hard work.C Dreams and friends.D Pirates and wars.Answer:C