Genomic Imprinting Is Termed "Epigenesist," Which Is Defined by Which

Genomic imprinting is termed "epigenesist," which is defined by which of the following?

A) gene expression results from regulated levels of DNA methylation
B) gene expression that is restricted to a specific cell lineage
C) gene regulation is exerted by sex-type specific factors
D) genotype differences are not reflected by phenotype differences
E) phenotype differences are independent of genotype variation