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Arrange a sequence of rational numbers -1, 2, -3, 4, -5, 6, ..., as shown in the figure. According to the arrangement pattern in the figure, the rational number at the top position of "Peak 1" (position C) is 4. Therefore, the rational number at position C of "Peak 3" is ______. In which position, out of A, B, C, D, E, should the number 2008 be placed?
