Which of the Following Statements About X Inactivation in Mammalian

Which of the following statements about X inactivation in mammalian females is FALSE?

A) Females that are heterozygous for an X-linked gene have patches of cells that express one allele and patches of cells that express the other.
B) Some genes on the inactive X continue to be expressed after the chromosome is inactivated.
C) X inactivation is random as to which X is inactivated and takes place early in embryonic development.
D) In an individual with three X chromosomes, one of the three will become inactivated.
E) Once an X chromosome first becomes inactivated in a cell, that same X will remain inactivated in somatic cells that are descendants of this cell.