Which of the following is part of the process of X chromosome inactivation

A) Expression of Xist from both chromosomes at the start of the process
B) Binding of multiple Xist transcripts to Xic on the X chromosome that will be inactivated
C) Compaction of the active X chromosome into a Barr body
D) Binding of Tsix transcripts to the X chromosome to be inactivated after the Xist transcripts binds to Xic