How do dietary factors interact with DNA methyltransferase to affect an organism's phenotype in an epigenetic manner?
A. Some dietary factors upregulate DNA methyltransferase activity, increasing the overall methylation of the organism's DNA and changing its gene expression
B. Some dietary factors degrade DNA methyltransferase, preventing it from removing methyl groups from sections of DNA, thereby altering gene expression
C. Some dietary factors bind to DNA methyltransferase and enable it to methylate DNA, thereby changing gene expression
D. Some dietary factors inhibit DNA methyltransferase activity, reducing the methylation of the organism's DNA and changing its gene expression
E. Some dietary factors interact with methyl groups directly preventing DNA methyltransferase from methylating any DNA, changing gene expression in the organism as a result
Answer: D
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