Which of the following statements is true regarding dosage compensation?

A) In Drosophila,one of the two X-chromosomes is randomly inactivated in females.
B) In mammals,the genes on the single X-chromosome in a male are transcribed at a higher level.
C)The X-inactive specific transcript is a functional RNA molecule that results in X-inactivation in Drosophila.
D) In C.elegans,dosage compensation results from partial repression of X-linked genes in hermaphrodites.
E) The gene product of the gene maleless is responsible for X-inactivation in mammals.