All of the following statements are true regarding inactivation of X-chromosome in mammals,except:

A) X-chromosome inactivation begins at the X-inactivation center.
B) All of the genes on an inactivated X-chromosome are transcriptionally silent.
C) Inactive X-chromosomes can be easily identified in mammalian cells.
D) The Barr body represents an inactive X-chromosome.
E) Inactive X-chromosomes have a different pattern of distribution of acetylated histone.