__________, I really believe that I’d prefer not to make any change now.

A．Considered all the possibilities

B．Taking all the possibilities into consideration

C．Taken all the possibilities into consideration

D．Giving all the possibilities

某种昆虫长翅（A）对残翅（a）为显性，直翅（B）对弯翅（b）为显性，有刺刚毛（D）对无刺刚毛（d）为显性，控制这3对性状的基因均位于常染色体上。现有这种昆虫一个体基因型如下图所示，请回答下列问题。

该昆虫细胞分裂中复制形成的两个D基因发生分离的时期有（）。