单选题：h0241. 对于Map("book" -> 5, "pen" -> 2).map(m => m._1 -> m._2 * 2)结果说法正确的

对于Map("book" -> 5, "pen" -> 2).map(m => m._1 -> m._2 * 2)结果说法正确的是？





A.Map("bookbook" -> 5, "penpen" -> 2)
B.Map("bookbook" -> 10, "penpen" -> 4)
C.Map("book" -> 10, "pen" -> 4)
D.Map("book" -> 5, "pen" -> 2 ,"book" -> 5, "pen" -> 2)


答案：C