The fоllоwing diаgrаm illustrаtes fоur genes from the genome of a certain mammal. Different binding sites are labeled in the enhancer region of each gene. In order for a specific gene to be expressed in the mammal’s cells, all of the gene’s binding sites must be bound by transcriptional activators. The mammal’s skin cells contain activators that bind to sites B, D, and E, while the mammal’s liver cells contain activators that bind to sites A, C, and E. Which of the following is a likely pattern of gene expression for the mammal described above?