下图所示的新基因起源机制是哪一种？ What is the mechanism of new gene origination described by the figure below?[img=288x118]1803a11743f8e21.png[/img] A: 逆转录转座 Retrotransposition B: 从头起源 De novo origination C: 外显子/结构域重排 exon/domain shuffling D: 基因水平转移 Lateral gene transfer