Which of the following statements about the nature of cell differentiation is false?( ).
选项：

A:With the progress of individual development, different genetic material is gradually lost in cells with different differentiation fate.;
B:All cell groups in multicellular organisms have identical and complete nuclear genomes.;
C:All differentiated cells have all the nuclear DNA of the species and the genetic information that encodes it.;
D:The root cause of cell differentiation is the selective expression of different genes in the genome in time and space.