The Order in Which Mammalian Hox Genes Are Expressed During

The order in which mammalian Hox genes are expressed during development

A) varies between males and females.
B) depends on circulating hormone levels.
C) proceeds from the posterior to the anterior parts of the embryo.
D) reflects the order in which they appear on their chromosomes.
E) is the same order in which they were described by biologists.