Which Statement About Hox Genes in Mammals Is True

Which statement about Hox genes in mammals is true?

A) Genes closest to the 5′ end of each gene complex are expressed first and in the posterior part of the embryo.
B) Hox genes provide information leading to sensory nerve connections developing in the dorsal region of the spinal cord and motor nerve connections developing in the ventral region.
C) Each of the Hox gene complexes has about four genes.
D) Genes closest to the 3′ end of each gene complex are expressed later and in the posterior part of the embryo.
E) Hox genes control body segmentation.