The agouti locus helps determine coat color in mice, and this phenotype can vary from light to dark between genetically identical individuals. You have discovered a drug that reduces the variation in the agouti phenotype. What is a likely explanation for this drug's mechanism of action?
A) It inhibits DNA polymerases. B) It inhibits DNA methyl transferases. C) It activates shelterin proteins. D) It activates mitochondrial transcription. E) It causes DNA damage.